List of state highways in Iowa

State highways in the U.S. state of Iowa are owned and maintained by the Iowa Department of Transportation.

Number	Length (mi)[1][2]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
No. 1	236[3]	380	Missouri state line near Lamoni	Minnesota state line near Northwood	01920-01-011920	01926-01-011926	Jefferson Highway through Iowa; replaced by US 65 and US 69
Iowa 1	119.268	191.943	Iowa 2 south of Keosauqua	US 151 south of Anamosa	01926-01-011926	current
Iowa 2	233.80[4]	376.26	US 6 near Lewis	IL 2 at Muscatine	01920-01-011920	01939-01-011939	Renumbered Iowa 92 (renumbering approved 1938)
Iowa 2	251.376	404.550	N-2 at Nebraska City, Neb.	US 61 at Fort Madison	01941-01-011941	current	Formerly Iowa 3
Iowa 3	267.07[4]	429.81	N-2 at Nebraska City, Neb.	IL 9 at Fort Madison	01920-01-011920	01941-01-011941	Renumbered Iowa 2
Iowa 3	326.163	524.908	SD 50 near Westfield	US 52 / US 61 / US 151 in Dubuque	01945-01-011945	current	Replaced part of Iowa 5, all of Iowa 221, and part of Iowa 10
Iowa 4	29.70[5]	47.80	US 59 / Iowa 141 at Denison	Iowa 175 at Odebolt	01920-01-011920	01968-12-311968	Renumbered Iowa 39
Iowa 4	146.343	235.516	Iowa 44 in Panora	MN 4 near Estherville	01969-01-011969	current	Formerly Iowa 17
Iowa 5	77.64[5]	124.95	Iowa 3 near Aurelia	US 169 at Fort Dodge	01920-01-011920	01968-12-311968	Renumbered Iowa 7
Iowa 5	103.540	166.631	Route 5 south of Cincinnati	I-35 near West Des Moines	01969-01-011969	current	Formerly portion of Iowa 60
No. 6	369[3]	594	Nebraska state line at Council Bluffs	Illinois state line at Clinton	01920-01-011920	01926-01-011926	Lincoln Highway through Iowa; replaced by US 30
Iowa 6	104	167	Route 5 near Cincinnati	US 32 in Des Moines	01926-01-011926	01931-01-011931	Formerly No. 17 and No. 59; became part of Iowa 60 when US 6 extended into Iowa
Iowa 7	140.69[4]	226.42	US 6 at Council Bluffs	City US 6 in Des Moines	01920-01-011920	01939-01-011939	Replaced by an extended Iowa 64
Iowa 7	0.47[6]	0.76	Iowa 99 in Oakville	Oakville	01955-01-011955	01957-01-011957	Renumbered Iowa 407; spur route
Iowa 7	24.18[5]	38.91	I-29 / US 77 in Sioux City	Iowa 3 near Brunsville	01957-01-011957	01968-12-311968	Formerly Iowa 29; portion became Iowa 985
Iowa 7	73.661	118.546	Iowa 3 near Aurelia	US 169 at Fort Dodge	01969-01-011969	current	Formerly Iowa 5
No. 8	283[3]	455	No. 6 in Council Bluffs	Illinois state line at Burlington	01920-01-011920	01926-01-011926	Replaced by US 34
Iowa 8	13.961	22.468	US 63 in Traer	US 218 near Garrison	01926-01-011926	current
Iowa 9	295.088	474.898	SD 42 near Larchwood	WIS 82 at Lansing	01920-01-011920	current
Iowa 10	104.512	168.196	SD 46 near Hawarden	Iowa 4 at Havelock	01920-01-011920	current
Iowa 11	96.60[4]	155.46	US 151 / Iowa 64 in Cedar Rapids	US 52 / Iowa 24 in Calmar	01920-01-011920	01941-01-011941	Replaced by Iowa 150, which was proposed to become part of US 150
Iowa 12	46.274	74.471	US 20 / US 75 at Sioux City	Iowa 10 in Hawarden	01920-01-011920	current	Signed as US 20 Bus through Sioux City
Iowa 13	85.235	137.172	US 30 / US 151 near Bertram	US 52 near Froelich	01920-01-011920	current
Iowa 14	187.838	302.296	Iowa 2 at Corydon	US 18 / US 218 Bus in Charles City	01920-01-011920	current
Iowa 15	111	179	US 30 in Ames	Minnesota state line near Lake Mills	01920-01-011920	01935-01-011935	Replaced by US 69
Iowa 15	14.92[5]	24.01	Iowa 137 at Eddyville	US 63 in Ottumwa	01937-01-011937	01968-12-311968	Renumbered Iowa 23
Iowa 15	4.655	7.491	Route 15 south of Milton	Iowa 2 at Milton	01969-01-011969	02003-01-012003	Formerly Iowa 23
Iowa 15	63.578	102.319	Iowa 3 near Pocahontas	MN 15 near Armstrong	01969-01-011969	current	Formerly Iowa 44
Iowa 16	239	385	Missouri state line near Redding	Minnesota state line near Ledyard	01920-01-011920	01930-01-011930	Replaced by US 169
Iowa 16	65.488	105.393	US 34 near Agency	US 61 at Wever	01930-01-011930	current
Iowa 17	147.48[5]	237.35	Iowa 64 in Panora	MN 4 near Estherville	01920-01-011920	01968-12-311968	Renumbered Iowa 4
Iowa 17	102.789	165.423	Iowa 141 at Granger	US 18 near Wesley	01969-01-011969	current	Formerly portion of Iowa 60
No. 18	148	238	Missouri state line at Braddyville	No. 23 at Sac City	01920-01-011920	01926-01-011926	Replaced by US 71
No. 19	302	486	South Dakota state line near Inwood	Wisconsin state line at Lansing	01920-01-011920	01926-01-011926	East end truncated to US 75 for a month in 1926; replaced by US 18
Iowa 19	2.44[6]	3.93	Backbone State Park	Iowa 3 / Iowa 13 near Strawberry Point	01927-01-011927	01957-01-011957	Renumbered Iowa 410
No. 20	324[3]	521	Illinois state line at Keokuk	Minnesota state line near Burr Oak	01920-01-011920	01926-01-011926	Replaced by US 61 and US 55
Iowa 21	115	185	Minnesota state line near Allendorf	Iowa 141 near Denison	01920-01-011920	01934-01-011934	Replaced by Iowa 73 (proposed US 73)
Iowa 21	97.152	156.351	Iowa 149 near Hedrick	US 20 / Iowa 27 at Waterloo	01934-01-011934	current	Formerly ended at Iowa 92; extended south in 1980
No. 22	34[3]	55	No. 5 at Le Mars	Minnesota state line north of Rock Rapids	01920-01-011920	01926-01-011926	Replaced by US 75
Iowa 22	97.905	157.563	Iowa 21 near Thornburg	US 61 at Davenport	01926-01-011926	current
No. 23	130[3]	209	South Dakota state line at Sioux City	No. 16 at Fort Dodge	01920-01-011920	01926-01-011926	Replaced by US 20
Iowa 23	4.78[5]	7.69	Route 15 south of Milton	Iowa 2 at Milton	01926-01-011926	01968-12-311968	Formerly part of No. 11; renumbered Iowa 15
Iowa 23	14.316	23.039	US 63 in Ottumwa	Iowa 137 at Eddyville	01969-01-011969	01997-01-011997	Formerly Iowa 15; partially replaced by US 63
Iowa 23	16.022	25.785	Iowa 92 at Oskaloosa	Iowa 149 near Fremont	01997-01-011997	current	Formerly US 63
Iowa 24	127	204	US 71 near Lyman	US 63 in Oskaloosa	01920-01-011920	01927-01-011927	Replaced by an extended Iowa 2
Iowa 24	27.546	44.331	US 18 / US 63 in New Hampton	US 52 / Iowa 150 in Calmar	01928-01-011928	current
No. 25	20	32	No. 15 / No. 24 at Winterset	No. 2 / No. 17 at Adel	01920-01-011920	01926-01-011926	Replaced by relocated Iowa 16
Iowa 25	103.419	166.437	Iowa 2 near Benton	US 30 near Scranton	01926-01-011926	current	Continued south to the Missouri state line until 1978, and to Blockton until 1980
Iowa 26	10	16	US 18 near Rock Valley	US 18 near Rock Valley	01920-01-011920	01930-01-011930	Replaced by relocated US 18 (portions were cancelled in exchange for relocated US 18)
Iowa 26	9.52[5]	15.32	US 18 in Inwood	Iowa 9 near Larchwood	01930-01-011930	01968-12-311968	Renumbered Iowa 182
Iowa 26	11.370	18.298	Iowa 9 in Lansing	MN 26 at New Albin	01969-01-011969	current	Formerly Iowa 182
Iowa 27	21.2	34.1	Iowa 12 in Akron	US 75 in Le Mars	01920-01-011920	01929-01-011929	Replaced by an extended Iowa 5
Iowa 27	11	18	Nebraska border	US 30 / US 75 in Missouri Valley	01929-01-011929	01930-01-011930	Renumbered Iowa 130
Iowa 27	6.86[7]	11.04	Alvord	US 75 near Rock Rapids	01930-01-011930	01980-01-011980	Spur route; originally from US 75 to George
Iowa 27	281.689	453.335	Route 27 near Wayland, Mo.	I-35 at the Minnesota state line	02001-01-012001	current	Avenue of the Saints
No. 28	72[3]	116	No. 6 / No. 11 in Cedar Rapids	No. 5 / No. 20 in Dubuque	01920-01-011920	01926-01-011926	Replaced by US 161
Iowa 28	21.613	34.783	Iowa 92 at Martensdale	I-35 / I-80 at Johnston	01926-01-011926	current	Previously ended at Iowa 5; extended to US 6 in 1980, and to I-80 in 1991
Iowa 29	22.06[6]	35.50	I-29 / US 77 in Sioux City	Iowa 3 near Brunsville	01920-01-011920	01957-01-011957	Renumbered Iowa 7 when I-29 was designated
No. 30	25	40	No. 23 at Moville	No. 5 at Remsen	01920-01-011920	01926-01-011926	Renumbered Iowa 140
Iowa 31	38.504	61.966	US 59 near Quimby	Iowa 141 near Smithland	01920-01-011920	current
No. 32	5	8	No. 5 near Cleghorn	Cleghorn	01920-01-011920	01926-01-011926	Renumbered Iowa 145
Iowa 32	7.68	12.36	Iowa 9 near Spirit Lake	US 71 near Milford	01934-01-011934	01981-01-011981	extended and renumbered Iowa 86 to match Minnesota
Iowa 32	5.101[7]	8.209	US 20 at Dubuque	US 52 / Iowa 3 at Sageville	01995-01-011995	02017-01-012017
Iowa 33	3.4	5.5	Meriden	Iowa 5	01920-01-011920	01930-01-011930
Iowa 33	55.95[5]	90.04	US 75 at Le Mars	MN 60 at Bigelow, Minn.	01930-01-011930	01968-12-311968	Renumbered Iowa 60
No. 34	68	109	No. 4 at Denison	No. 12 at Sioux City	01920-01-011920	01926-01-011926	Renumbered Iowa 141
Iowa 35	49.00[8]	78.86	Iowa 37 near Turin	US 71 near Odebolt	01920-01-011920	01948-01-011948	Replaced by an extended Iowa 175
Iowa 35	0.23[6]	0.37	US 18 near Garner	Garner	01954-01-011954	01957-01-011957	Spur route; renumbered Iowa 409 when I-35 was designated
Iowa 36	2.983	4.801	Wall Lake	US 71 near Wall Lake	01920-01-011920	02003-01-012003	Spur route
Iowa 37	40.321	64.890	Iowa 175 near Turin	US 59 near Earling	01920-01-011920	current	Continued east to Irwin until 1982
Iowa 38	98.941	159.230	US 61 Bus / Iowa 92 in Muscatine	Iowa 3 near Edgewood	01920-01-011920	current
Iowa 39	11.68[5]	18.80	US 30 near Logan	Iowa 64 / Iowa 191 at Portsmouth	01920-01-011920	01968-12-311968	Renumbered Iowa 44
Iowa 39	24.321	39.141	US 59 at Denison	Iowa 175 at Odebolt	01969-01-011969	current	Formerly Iowa 4
No. 40	262[3]	422	No. 20 in Keokuk	Minnesota state line near Mona	01920-01-011920	01926-01-011926	Replaced by US 161, US 30, and US 218
Iowa 40	3.524	5.671	Allerton	Iowa 2 near Corydon	01926-01-011926	02003-01-012003	Spur route
Iowa 41	1.827	2.940	Malvern	US 34 near Malvern	01920-01-011920	02003-01-012003	Spur route
Iowa 42	4.18	6.73	US 275 / Iowa 2 near Riverton	Riverton	01920-01-011920	01980-12-011980	Spur route
Iowa 43	1.75	2.82	Ringsted	Iowa 15 near Ringsted	01920-01-011920	01980-01-011980	Spur route
Iowa 44	63.95[5]	102.92	Iowa 3 near Pocahontas	MN 15 near Armstrong	01920-01-011920	01968-12-311968	Renumbered Iowa 15
Iowa 44	104.524	168.215	US 30 near Logan	Iowa 141 at Grimes	01969-01-011969	current	Formerly Iowa 39 and Iowa 64
Iowa 45	1.324	2.131	Manilla	Iowa 141 near Manilla	01920-01-011920	02003-01-012003	Spur route
Iowa 46	64.84[4]	104.35	US 59 near Denison	Iowa 17 (now Iowa 144) in Perry	01920-01-011920	01941-01-011941	Originally a double spur route; replaced by an extended Iowa 141
Iowa 46	4.34	6.98	Iowa 90 in Des Moines	Iowa 28 (now Army Post Road) in Des Moines	01942-01-011942	01950-01-011950	Now 9th Street, Mulberry Street, and 7th Street
Iowa 46	6.57[9]	10.57	Iowa 5 near Avon	Iowa 163 in Des Moines	01953-01-011953	01998-01-011998
Iowa 47	13	21	Iowa 287 in Farnhamville	US 169 near Harcourt	01920-01-011920	01940-01-011940	Spur route; replaced by an extended Iowa 175
Iowa 47	0.82	1.32	Iowa 14 near Allison	Allison	01941-01-011941	01980-01-011980	Spur route
Iowa 48	47.919	77.118	US 59 at Shenandoah	US 6 near Lewis	01920-01-011920	current
Iowa 49	27.228	43.819	Iowa 2 in Bedford	US 34 in Adams County	01920-01-011920	02003-01-012003	Was originally a spur route from US 34 to Lenox
Iowa 50	7.135	11.483	US 169 near Lehigh	Lehigh	01920-01-011920	02003-01-012003	Spur route
Iowa 51	11.007	17.714	US 18 / US 52 at Postville	Iowa 9 near Waukon	01920-01-011920	current
Iowa 52	7[10]	11	Elma	US 63 east of Elma	01920-01-011920	01934-01-011934	Spur route; renumbered Iowa 272 when US 52 extended into Iowa
No. 53	13	21	No. 14 near Rockford	No. 19 near Nora Springs	01920-01-011920	01926-01-011926	Renumbered Iowa 147 to avoid conflict with US 53 (which became US 55 in the revised numbering plan; see below)
Iowa 53	3.04[8]	4.89	Iowa 3 near Clarksville	Clarksville	01926-01-011926	01949-01-011949	Formerly No. 55; became part of Iowa 188
Iowa 53	1.43[11]	2.30	Gowrie	Iowa 175 near Gowrie	01953-01-011953	01969-01-011969	Spur route
Iowa 54	2.99	4.81	Marble Rock	Iowa 14 in Floyd County	01920-01-011920	01980-01-011980	Spur route
No. 55	3	5	No. 10 near Clarksville	Clarksville	01920-01-011920	01926-01-011926	Renumbered Iowa 53 to avoid conflict with US 55
Iowa 55	4.506	7.252	Seymour	Iowa 2 near Promise City	01934-01-011934	02003-01-012003	Spur route
Iowa 56	24.432	39.319	Iowa 150 at West Union	Iowa 13 at Elkader	01920-01-011920	current
Iowa 57	18.41[12]	29.63	Iowa 14 near Fern	Iowa 58 in Cedar Falls	01920-01-011920	01986-01-011986	Section from Iowa 58 to US 20 was deleted in 1980; removed after US 20 freeway was constructed
Iowa 57	43.765	70.433	US 65 near Iowa Falls	US 218 / Iowa 27 / Iowa 58 at Cedar Falls	01986-01-011986	current	Formerly US 20
Iowa 58	12.030	19.360	US 63 at Hudson	US 218 / Iowa 27 / Iowa 57 at Cedar Falls	01920-01-011920	current
Iowa 59	197[10]	317	Minnesota state line	Iowa 5 at Albia	01920-01-011920	01934-01-011934	Replaced by US 63 and Iowa 137
Iowa 60	233.24[5]	375.36	Route 5 south of Cincinnati	US 18 near Wesley	01920-01-011920	01968-12-311968	Renumbered Iowa 5 and Iowa 17
Iowa 60	58.771	94.583	US 75 at Le Mars	MN 60 at Bigelow, Minn.	01969-01-011969	current	Formerly Iowa 33
No. 61	73	117	No. 28 at Anamosa	No. 6 in Lyons	01920-01-011920	01926-01-011926	Renumbered Iowa 117 and Iowa 136
Iowa 62	19.633	31.596	Iowa 64 at Maquoketa	US 52 in Bellevue	01920-01-011920	current
No. 63	24	39	No. 59 in New Sharon	No. 7 in Grinnell	01920-01-011920	01926-01-011926	Renumbered Iowa 146
Iowa 64	32	51	Iowa 163 at Prairie City	US 30 in Colo	01920-01-011920	01936-01-011936	Renumbered Iowa 117
Iowa 64	64.355	103.569	US 151 at Anamosa	US 52 / IL 64 at Savanna, Ill.	01939-06-201939	current	Formerly Iowa 117
No. 65	21	34	No. 8 at Lucas	No. 1 south of Indianola	01920-01-011920	01926-01-011926	Renumbered Iowa 137
Iowa 66	7	11	Humeston	Iowa 3 near Humeston	01920-01-011920	01930-01-011930	Spur route; replaced by an extended Iowa 137
Iowa 66	7.011	11.283	Iowa 2 near Diagonal	Diagonal	01930-01-011930	02003-01-012003	Spur route
Iowa 67	6[10]	10	Seymour	Iowa 3 near Promise City	01920-01-011920	01934-01-011934	Spur route; renumbered Iowa 55 when US 67 extended into Iowa
Iowa 68	1.933	3.111	Melrose	US 34 near Melrose	01920-01-011920	02003-01-012003	Spur route
No. 69	3	5	No. 3 near Mystic	Mystic	01920-01-011920	01926-01-011926	Renumbered Iowa 138
Iowa 70	8.20[5]	13.20	Macksburg	US 169 near Macksburg	01920-01-011920	01966-01-011966	Spur route
Iowa 70	23.954	38.550	Iowa 92 at Columbus Junction	US 6 in West Liberty	01969-01-011969	current	Formerly Iowa 76
No. 71	3	5	Moulton	No. 3 near Moulton	01920-01-011920	01926-01-011926	Renumbered Iowa 142
Iowa 72	10.89[12]	17.53	US 69 west of Dows	I-35 east of Dows	01920-01-011920	01986-01-011986	Originally a spur route; extended east from Dows to I-35 in 1980
Iowa 73	35.9	57.8	Iowa 8 in Dysart	US 6 in Marengo	01920-01-011920	01934-01-011934	Renumbered Iowa 212 to avoid conflict with new Iowa 73, which was proposed to become part of US 73
Iowa 73	225	362	Missouri state line south of Shenandoah	Minnesota state line near Allendorf	01934-01-011934	01935-01-011935	Was proposed to become part of US 73; replaced by US 59
Iowa 73	14.97[13]	24.09	Iowa 141 in Coon Rapids	Iowa 44	01936-01-011936	01972-01-011972
Iowa 74	38.27[4]	61.59	Iowa 38 in Tipton	US 61 in Davenport	01920-01-011920	01941-01-011941	Replaced by Iowa 150, which was proposed to become part of US 150
Iowa 74	11.168	17.973	US 151 in Cedar Rapids	Palo	01943-01-011943	01966-01-011966	Spur route; renumbred Iowa 94 when I-74 was designated
No. 75	2	3	No. 5 near Marcus	Marcus	01920-01-011920	01926-01-011926	Renumbered Iowa 143
Iowa 76	25.98[5]	41.81	Columbus City	US 6 in West Liberty	01920-01-011920	01968-12-311968	Renumbered Iowa 70
Iowa 76	48.911	78.715	US 18 near McGregor	MN 76 near Eitzen, Minn.	01969-01-011969	current	Formerly portion of Iowa 13
Iowa 77	2.685	4.321	Iowa 92 near Keota	Keota	01920-01-011920	02003-01-012003	Spur route; continued south to Iowa 78 until 1980
Iowa 78	58.429	94.032	Iowa 149 near Martinsburg	US 61 near Morning Sun	01920-01-011920	current
Iowa 79	1.84	2.96	Iowa 2 near Bonaparte	Bonaparte	01920-01-011920	01980-01-011980	Spur route
Iowa 79	5.637	9.072	Geode State Park	US 34 in Middletown	01980-01-011980	02003-01-012003	Park access road
Iowa 80	4.00[6]	6.44	US 34 near West Burlington	US 61 in Burlington	01920-01-011920	01957-01-011957	Spur route; renumbered Iowa 406 when I-80 was designated
Iowa 81	9.20[5]	14.81	Iowa 92 near West Chester	Iowa 22 at Wellman	01920-01-011920	01968-12-311968	Renumbered Iowa 114
Iowa 81	2.215	3.565	Route 81 near Farmington	Iowa 2 near Farmington	01969-01-011969	current	Formerly Iowa 114
Iowa 82	3.773	6.072	Blairstown	US 30 near Blairstown	01920-01-011920	02003-01-012003	Spur route
Iowa 83	34.191	55.025	US 59 in Avoca	Iowa 148 in Anita	01920-01-011920	current	Continued west to Neola until 2003
Iowa 84	6.09[8]	9.80	College Springs	US 71 near Shambaugh	01920-01-011920	01943-01-011943	Spur route; replaced by an extended Iowa 333
Iowa 84	2.13	3.43	The Eastern Iowa Airport	I-380 near Cedar Rapids	01943-01-011943	01980-01-011980	Airport access road
Iowa 85	8.408	13.531	Montezuma city limits	Iowa 21 near Deep River	01920-01-011920	current
Iowa 86	4	6	US 34 in Council Bluffs	Lake Manawa	01920-01-011920	01928-01-011928	Spur route; restored in 1931 as Iowa 241, later Iowa 192
Iowa 86	3.7	6.0	US 61 (now Sunnyside Avenue) in Burlington	US 61 (now Summer Street) in Burlington	01929-01-011929	01945-01-011945	Now Roosevelt Avenue and West Avenue
Iowa 86	0.47	0.76	Fertile	Iowa 9 at Fertile	01945-01-011945	01980-01-011980	Spur route
Iowa 86	12.519	20.147	US 71 near Milford	MN 86 near Spirit Lake	01980-01-011980	current
Iowa 87	4.06[14]	6.53	US 69 west of Elkhart	Elkhart	01920-01-011920	01983-01-011983	Spur route
Iowa 88	37.65[4]	60.59	US 6 in Altoona	US 30 near Marshalltown	01920-01-011920	01939-01-011939	Originally a spur route; replaced by an extended Iowa 64
Iowa 88	8.01	12.89	US 61 / Iowa 2 in Fort Madison	Iowa 16 in Denmark	01940-01-011940	01980-01-011980	Originally a spur route
Iowa 89	25.87[4]	41.63	US 169 near Bouton	Iowa 64 in Johnston	01920-01-011920	01941-01-011941	Originally a spur route; replaced by an extended Iowa 141
Iowa 89	7.69	12.38	Iowa 141 near Woodward	Iowa 17 in Madrid	01946-01-011946	01980-11-011980	Replaced by an extended Iowa 210
No. 90	40	64	No. 17 near Bouton	No. 16 at Harcourt	01920-01-011920	01926-01-011926	Replaced by relocated Iowa 16
Iowa 90	16	26	Iowa 14 at Grundy Center	Iowa 59 near Voorhies	01926-01-011926	01932-01-011932	Formerly No. 58; became part of Iowa 58 again
Iowa 90	16.32[15]	26.26	I-80 in Dallas County	I-35 in Des Moines	01932-01-011932	01981-01-011981
Iowa 91	2.69[4]	4.33	US 169 near Harcourt	Dayton	01920-01-011920	01940-01-011940	Spur route; replaced by an extended Iowa 175
Iowa 91	4.18	6.73	Ledyard	US 169 near Ledyard	01940-01-011940	01980-05-011980	Spur route
Iowa 91	4.643	7.472	Iowa 9 in Lyon County	MN 91 at the Minnesota state line	01980-01-011980	02003-01-012003
Iowa 92	1.33[4]	2.14	Iowa 101 near Urbana	Urbana	01920-01-011920	01939-01-011939	Spur route; became Iowa 363
Iowa 92	274.231	441.332	US 275 / N-92 in Council Bluffs	IL 92 at Muscatine	01939-01-011939	current	Formerly Iowa 2
Iowa 93	29.534	47.530	US 63 near Tripoli	Iowa 150 in Fayette	01920-01-011920	current
Iowa 94	13.12[6]	21.11	US 151 in Marion	US 30 in Mount Vernon	01920-01-011920	01958-01-011958	Replaced by relocated Iowa 150
Iowa 94	11.168	17.973	US 151 Business in Cedar Rapids	Palo	01966-01-011966	02003-01-012003	Spur route
Iowa 95	6	10	US 169 near Bouton	Woodward	01920-01-011920	01932-01-011932	Spur route; replaced by an extended Iowa 89
Iowa 95	3.70	5.95	Carbon	Iowa 148 north of Corning	01932-01-011932	01983-01-011983	Spur route; section inside Carbon eliminated 1980; rest redesignated Iowa 951
Iowa 96	16.635	26.771	Iowa 14 near Gladbrook	US 63 near Gladbrook	01920-01-011920	current
Iowa 97	1.532	2.466	Russell	US 34 near Russell	01920-01-011920	02003-01-012003	Spur route
Iowa 98	11.10[8]	17.86	US 34 near Agency	Selma	01920-01-011920	01944-01-011944	Spur route; replaced by an extended Iowa 16, and Iowa 98 was reassigned to the old route of Iowa 16
Iowa 98	1.814	2.919	Leando	Iowa 16 near Douds	01944-01-011944	02017-01-012017	Spur route
Iowa 99	33	53	US 30 near Camanche	US 61 in Davenport	01920-01-011920	01931-01-011931	Replaced by US 55 (later US 67)
Iowa 99	33.232	53.482	US 34 in Burlington	US 61 in Wapello	01931-01-011931	02003-01-012003
Iowa 100	44.42[6]	71.49	US 275 / Iowa 375 in Council Bluffs	US 71 in Lyman	01920-01-011920	01958-01-011958	Originally a spur route; replaced by relocated Iowa 92
Iowa 100	6.12[16]	9.85	US 6 near Lewis	US 71 near Atlantic	01958-01-011958	01958-01-011958	Former section of Iowa 92; renumbered Iowa 414 due to confusion with old Iowa 100
Iowa 100	11.628	18.713	Covington Road in Cedar Rapids	US 151 / Iowa 13 near Marion	01984-01-011984	current
Iowa 101	15.56	25.04	US 218 in Vinton	Iowa 150 north of Urbana	01920-01-011920	01984-01-011984	Replaced by a relocated Iowa 150
Iowa 102	1.82	2.93	Hawkeye	US 18 near Hawkeye	01920-01-011920	01980-01-011980
Iowa 102	0.501	0.806	New Sharon city limits	US 63 / Iowa 146 in New Sharon	01980-01-011980	current	Unsigned highway; formerly extended to Pella
Iowa 103	15.649	25.185	US 218 near Donnellson	US 61 / Iowa 2 in Fort Madison	01920-01-011920	02003-01-012003
No. 104	20	32	No. 8 near Council Bluffs	No. 4 in Macedonia	01920-01-011920	01926-01-011926	First highway to be decommissioned in Iowa
Iowa 104	1.53	2.46	Woodburn	US 34 near Woodburn	01927-01-011927	01980-01-011980	Spur route
Iowa 105	34.23[12]	55.09	US 69 in Lake Mills	US 218 in St. Ansgar	01920-01-011920	01992-01-011992	Section from US 69 to Winnebago–Worth county line last shows on 1994 map, so was signed until 1994
Iowa 106	8.98	14.45	Iowa 107 in Clear Lake	US 65 in Mason City	01920-01-011920	01980-01-011980
Iowa 107	27.579	44.384	Iowa 3 near Alexander	CR B35 near Clear Lake	01920-01-011920	02011-01-012011	All but parts in Meservey and Thornton removed in 2003
Iowa 108	1.18	1.90	Delta	Iowa 92 near Delta	01923-01-011923	01980-01-011980	Spur route
Iowa 109	1.268	2.041	Oxford	US 6 near Oxford	01923-01-011923	02003-01-012003	Spur route
Iowa 110	0.7	1.1	Larrabee	Iowa 73 in Larrabee	01923-01-011923	01934-01-011934	Spur route; decommissioned when Iowa 73 (proposed US 73) was relocated to go through Larrabee
Iowa 110	14.789	23.801	US 20 at Schaller	Iowa 7 at Storm Lake	01934-01-011934	current
Iowa 111	26.72[17]	43.00	Kanawha	Woden	01923-01-011923	01990-01-011990	Double spur route with US 18; originally a spur route
Iowa 112	3	5	Iowa 13	Edgewood	01923-01-011923	01930-01-011930	Spur route; replaced by an extended Iowa 10 (this section now Iowa 3)
Iowa 112	5.19	8.35	Volga	Iowa 13 near Osborne	01931-01-011931	01980-01-011980	Spur route
Iowa 113	34.09[4]	54.86	Iowa 10 near Edgewood	US 151 in Monticello	01924-01-011924	01938-01-011938	Replaced by an extended Iowa 38
Iowa 113	1.187	1.910	Iowa 64 near Spragueville	Spragueville	01938-01-011938	02003-01-012003	Spur route
Iowa 114	2.22[5]	3.57	Route 81 near Farmington	Iowa 2 near Farmington	01923-01-011923	01968-12-311968	Renumbered Iowa 81
Iowa 114	9.20	14.81	Iowa 92 near West Chester	Iowa 22 at Wellman	01969-01-011969	01981-01-011981	Formerly Iowa 81
Iowa 115	1.34[11]	2.16	US 69	Story City	01923-01-011923	01969-01-011969	Spur route
Iowa 115	1.237	1.991	US 34 near Stanton	Viking Lake State Park	01980-01-011980	02003-01-012003	Park access road
Iowa 116	1.57[18]	2.53	US 20 near Manchester	Manchester Fish Hatchery	01923-01-011923	01976-01-011976	Fish hatchery access road; renumbered Iowa 938 because US 20 was rerouted
Iowa 116	2.776	4.468	Iowa 3 in Waverly	US 218 near Waverly	01998-01-011998	current	Section of US 218 Business in Waverly
Iowa 117	63	101	US 161 at Anamosa	US 52 / IL 64 at Savanna, Ill.	01923-01-011923	01936-01-011936	Renumbered Iowa 64
Iowa 117	18.562	29.873	Iowa 163 at Prairie City	US 65 / Iowa 330 near Mingo	01939-06-201939	current	Formerly Iowa 64
Iowa 118	4.06[17]	6.53	Steamboat Rock	Iowa 175 near Eldora	01923-01-011923	01989-01-011989	Spur route
Iowa 119	1.04	1.67	Dorchester	Iowa 76 near Dorchester	01923-01-011923	01980-01-011980	Spur route
Iowa 120	0.80	1.29	Stanton	US 34 near Stanton	01924-01-011924	01980-01-011980	Spur route
Iowa 121	0.51[19]	0.82	Dolliver Memorial State Park	Iowa 50 near Lehigh	01924-01-011924	01964-01-011964	Park access road
Iowa 122	5.47[16]	8.80	Iowa 150 in Davenport	US 61 in Davenport	01924-01-011924	01960-01-011960	Now Pine Street, Cheyenne Avenue, Division Street, Locust Street, and Marquette Street
Iowa 122	3.04	4.89	Iowa 3 near Clarksville	Clarksville	01964-01-011964	01965-01-011965	Former section of Iowa 188; became part of Iowa 188 again
Iowa 122	12.264	19.737	I-35 / US 18 at Clear Lake	Mason City city limits	01999-01-011999	current
Iowa 123	10.51	16.91	I-35 in Des Moines	Iowa 90 in Des Moines	01924-01-011924	01959-01-011959	Partially replaced by Iowa 60; rest now Fleur Drive
Iowa 123	0.45	0.72	US 34 near Rome	Rome	01969-01-011969	01980-01-011980	Spur route; inside Rome stayed in the highway system until 1981
Iowa 124	2.567	4.131	Iowa 4 in Calhoun County	Twin Lakes State Park	01924-01-011924	02003-01-012003	Park access road
Iowa 125	3.26	5.25	Salem	US 218 east of Salem	01924-01-011924	01981-01-011981	Spur route; section inside Salem deleted in 1980
Iowa 126	1.28	2.06	US 6 near Mitchellville	Mitchellville	01924-01-011924	01980-01-011980	Spur route
Iowa 127	15.985	25.725	I-29 near Mondamin	US 30 in Logan	01924-01-011924	current
Iowa 128	6.982	11.236	Iowa 13 near Elkader	US 52 near Garnavillo	01924-01-011924	current
Iowa 129	0.45[11]	0.72	US 34 near Rome	Rome	01924-01-011924	01969-01-011969	Spur route; renumbered Iowa 123 when I-129 was designated
Iowa 130	12	19	Iowa 9 near Cresco	Minnesota border near Harmony, Minn	01925-01-011925	01930-01-011930	Renumbered Iowa 139 so Iowa 130 could be reused as a spur of US 30
Iowa 130	11	18	Nebraska border	US 30 / US 75 in Missouri Valley	01930-01-011930	01931-01-011931	Formerly Iowa 27; replaced by relocated US 30
Iowa 130	6.65[5]	10.70	Maquoketa Caves State Park	US 61 near Maquoketa	01931-01-011931	01966-01-011966	Park access road
Iowa 130	32.023	51.536	Iowa 38 in Tipton	I-80 / US 61 at Davenport	01969-01-011969	current
Iowa 131	2[10]	3	US 20 near Holstein	US 59 near Holstein	01925-01-011925	01937-01-011937	Section from US 20 to Holstein replaced by realigned US 59; rest given to county because US 59 was realigned
Iowa 131	4.520	7.274	Iowa 21 in Belle Plaine	US 30 near Belle Plaine	01937-01-011937	02003-01-012003	Part of the Lincoln Highway
Iowa 132	5.74[19]	9.24	I-35 / I-80 in Des Moines	Iowa 90 (now US 6) in Des Moines	01925-01-011925	01963-01-011963	Now Douglas Avenue
Iowa 133	4.23[16]	6.81	US 34 / US 218 in Mount Pleasant	Oakland Mills Park (then a state park)	01925-01-011925	01961-01-011961	Park access road
Iowa 133	0.970	1.561	US 30 in Nevada	Nevada	01964-01-011964	02003-01-012003	Spur route
Iowa 134	7	11	US 65 near Hubbard	Iowa 58	01925-01-011925	01930-01-011930	Replaced by relocated Iowa 58
Iowa 134	8	13	Nebraska state line	US 34 / US 275 in Glenwood	01930-01-011930	01935-01-011935	Replaced by relocated US 34
Iowa 134	4.06	6.53	US 65 near Hampton	Geneva	01935-01-011935	01980-01-011980	Spur route
Iowa 134	1.75[20]	2.82	Beed's Lake State Park	Iowa 3 near Hampton	01980-01-011980	01987-01-011987	Park access road
Iowa 135	0.75[21]	1.21	US 30 near Le Grand	Le Grand	01926-01-011926	01954-01-011954	Spur route; replaced by relocated US 30; Iowa 135 on route shown below
Iowa 135	1.96	3.15	Montour	US 30 near Montour	01954-01-011954	01980-01-011980	Spur route
Iowa 136	97.733	157.286	IL 136 at Clinton	US 52 / Iowa 3 at Luxemburg	01926-01-011926	current
Iowa 137	21	34	US 34 at Lucas	US 65 near Indianola	01926-01-011926	01934-01-011934	Formerly No. 65; replaced by realigned US 65
Iowa 137	14.526	23.377	Iowa 5 at Albia	US 63 / Iowa 163 at Eddyville	01934-01-011934	current	Formerly Iowa 59
Iowa 138	3.16[22]	5.09	Iowa 2 near Mystic	Mystic	01926-01-011926	01973-01-011973	Formerly No. 69
Iowa 139	21	34	US 161 in Iowa City	Iowa 38 near Rochester	01926-01-011926	01929-01-011929	Formerly No. 74; replaced by an extended Iowa 1
Iowa 139	11.431	18.396	Iowa 9 near Cresco	MN 139 near Harmony, Minn	01930-01-011930	current	Formerly Iowa 130; continued south to Protivin from 1935 to 1980
Iowa 140	25.309	40.731	US 20 at Moville	Iowa 3 at Remsen	01926-01-011926	current	Formerly No. 30; continued south to Sloan from 1931 to 1961, and to Hornick from 1961 to 1964; section from Kingsley to Remsen deleted in 1965, but restored in 1980
Iowa 141	155.362	250.031	I-29 near Sloan	I-35 / I-80 at Grimes	01926-01-011926	current
Iowa 142	10.50[5]	16.90	Route 202 at Coatsville, Mo	Iowa 2 near Moulton	01926-01-011926	01968-12-311968	Renumbered Iowa 202
Iowa 142	20.901	33.637	Iowa 2 in Plano	Iowa 5 near Moravia	01980-01-011980	02003-01-012003
Iowa 143	12.049	19.391	Iowa 3 at Marcus	Iowa 10 at Granville	01926-01-011926	current
Iowa 144	34.039	54.780	Iowa 141 at Perry	Iowa 175 near Harcourt	01926-01-011926	current
Iowa 145	5	8	Iowa 5 near Cleghorn	Cleghorn	01926-01-011926	01931-01-011931	Formerly No. 32
Iowa 145	7.408	11.922	I-29 near Thurman	US 275 near Sidney	01931-01-011931	02003-01-012003	Originally a spur route west to Thurman; extended west in 1980
Iowa 146	42.735	68.775	US 63 / Iowa 102 in New Sharon	US 30 in Le Grand	01926-01-011926	current
Iowa 147	6.706	10.792	Rockford	Iowa 14 in Floyd County	01926-01-011926	02003-01-012003	Spur route
Iowa 148	66.828	107.549	Route 148 near Bedford	I-80 / US 6 near Anita	01926-01-011926	current
Iowa 149	65.897	106.051	US 34 in Ottumwa	I-80 near Williamsburg	01926-01-011926	current	Section from I-80 to US 6 removed 1985
Iowa 150	19	31	US 32 at Homestead	US 30 near Cedar Rapids	01926-01-011926	01930-01-011930	Formerly No. 13; replaced by an extended Iowa 149
Iowa 150	10	16	Schleswig	Iowa 141 near Denison	01930-01-011930	01930-01-011930	Replaced by an extended Iowa 21
Iowa 150	22.96	36.95	US 30 / Iowa 17 in Jefferson	Iowa 64 in Panora	01931-01-011931	01941-01-011941	Replaced by relocated Iowa 17 to avoid conflict with new Iowa 150, which was proposed to become part of US 150
Iowa 150	85.093	136.944	US 218 at Vinton	US 52 / Iowa 24 at Calmar	01941-01-011941	current
Iowa 151	13[10]	21	US 71 at Auburn	Iowa 17 near Lake City	01926-01-011926	01938-01-011938	Formerly No. 35; renumbered Iowa 188 when US 151 extended into Iowa
Iowa 152	1.31	2.11	US 34 near Murray	Murray	01926-01-011926	01980-01-011980	Formerly No. 8
Iowa 152	1.402	2.256	I-35 near Osceola	US 69 at Osceola	01980-01-011980	02014-01-012014
Iowa 153	7.0	11.3	Iowa 117 in Wyoming	Oxford Junction	01926-01-011926	01930-01-011930	Replaced by an extended Iowa 136
Iowa 153	4.82[6]	7.76	US 218 near North Liberty	US 6 near Coralville	01930-01-011930	01957-01-011957	Replaced by rerouted US 218
Iowa 153	1.02[5]	1.64	US 218 near North Liberty	North Liberty	01957-01-011957	01968-01-011968	Now Dubuque Street
Iowa 154	12.82	20.63	Iowa 150 near Fayette	Iowa 3 in Maryville	01926-01-011926	01980-11-011980	Replaced by Iowa 187
Iowa 155	7.0	11.3	Commerce	Iowa 28 (now 9th Street) in Des Moines	01927-01-011927	01931-01-011931	Spur route; now Walnut Woods Drive, Browns Woods Drive, and McKinley Avenue; parts of the road were destroyed
Iowa 155	3.05	4.91	Nodaway	US 34 near Nodaway	01933-01-011933	01980-10-011980	Spur route
Iowa 156	4.748	7.641	Iowa 5 near Marysville	Bussey	01928-01-011928	02003-01-012003	Spur route; section inside Bussey removed 1980
Iowa 157	0.15	0.24	Monticello	US 161 near Monticello	01928-01-011928	01931-01-011931	Spur route; now Cedar Street; was the shortest state highway at the time
Iowa 157	1.032	1.661	US 63 near Lime Springs	Lime Springs	01931-01-011931	02003-01-012003	Spur route
Iowa 158	0.65[16]	1.05	Iowa 60 near Carlisle	Carlisle	01929-01-011929	01962-01-011962	Spur route
Iowa 159	1.83	2.95	Iowa 92 near Harper	Harper	01929-01-011929	01980-01-011980	Spur route
Iowa 160	0.82[8]	1.32	Wild Cat Den State Park	US 61	01930-01-011930	01947-01-011947	Renumbered Iowa 389 so Iowa 160 could be reused as a spur of Iowa 60 (this section now Iowa 415)
Iowa 160	2.446	3.936	Iowa 415 at Ankeny	I-35 at Ankeny	01947-01-011947	current	extended east from US 69 to I-35 in 1980
Iowa 161	1.15[8]	1.85	Iowa 25 in Guthrie County	Springbrook State Park	01938-01-011938	01944-01-011944	Renumbered Iowa 384 so Iowa 161 could be reused as a spur of US 61
Iowa 161	0.47[23]	0.76	US 61 in Keokuk	Illinois state line	01944-01-011944	01951-01-011951	Replaced by US 136
Iowa 161	1.224	1.970	Iowa 141 at Dedham	Iowa 141 near Dedham	01951-01-011951	02003-01-012003	Former route of Iowa 141
Iowa 162	2.660	4.281	Pammel State Park	Iowa 92 in Madison County	01930-01-011930	01982-01-011982	Park access road; renumbered Iowa 322 to avoid confusion with nearby US 169
Iowa 162	2.0	3.2	US 18 in Charles City	US 218 in Charles City	02000-01-012000	02006-01-012006	Former section of US 218; became part of relocated US 18
Iowa 163	1	2	Ambrose A. Call State Park	US 169 near Algona	01930-01-011930	01934-01-011934	Park access road; renumbered Iowa 274 when US 163 was designated
Iowa 163	166.270	267.586	US 69 in Des Moines	US 34 at Burlington	01937-01-011937	current
Iowa 164	3.79[17]	6.10	US 30 in Boone	Ledges State Park	01930-01-011930	01990-01-011990	Park access road
Iowa 165	4.67[21]	7.52	Lewis and Clark State Park	US 75 in Onawa	01930-01-011930	01955-01-011955	Park access road; replaced by an extended Iowa 175
Iowa 165	0.410	0.660	Abbott Drive at Omaha, Neb.	Abbott Drive at Omaha, Neb.	01956-01-011956	current	Only state highway west of the Missouri River
Iowa 166	0.57	0.92	Hastings	US 34 near Hastings	01930-01-011930	01980-11-011980	Spur route
Iowa 167	3.21	5.17	Doon	US 75 near Doon	01930-01-011930	01980-01-011980	Spur route
Iowa 168	2.70	4.35	Iowa 83 near Minden	Shelby	01930-01-011930	01980-01-011980	Spur route
Iowa 169	3	5	Elk Horn	Iowa 7 at Kimballton	01930-01-011930	01930-01-011930	Spur route; renumbered Iowa 173 when US 169 was created in Iowa
Iowa 170	1.68[22]	2.70	Everly	US 18 near Everly	01930-01-011930	01974-01-011974	Spur route
Iowa 171	1	2	Wall Lake State Park (now Big Wall Lake Wildlife Area)	US 75 in Onawa	01930-01-011930	01935-01-011935	Park access road
Iowa 171	1.05	1.69	Elberon	Iowa 21 near Elberon	01935-01-011935	01980-01-011980	Spur route
Iowa 172	4.23	6.81	Elgin	US 18 in Clermont	01930-01-011930	01980-01-011980	Spur route
Iowa 173	14.680	23.625	Iowa 83 near Atlantic	Iowa 44 at Kimballton	01930-01-011930	current	Originally a spur route south to Elk Horn; extended in 1980
Iowa 174	3.61[18]	5.81	Farragut	Iowa 2 near Farragut	01930-01-011930	01976-01-011976	Spur route
Iowa 175	221.367	356.256	N-51 at Decatur, Neb	US 63 near Hudson	01930-01-011930	current	Originally a spur route
Iowa 176	1.21[13]	1.95	Iowa 92 near Cumberland	Cumberland	01930-01-011930	01972-01-011972	Spur route
Iowa 177	1	2	Carson	US 59 near Carson	01930-01-011930	01937-01-011937	Spur route; decommissioned when Iowa 100 (now Iowa 92) extended west through Carson
Iowa 177	3.20	5.15	Iowa 9 near Osage	Mitchell	01937-01-011937	01980-01-011980	Spur route
Iowa 178	0.98	1.58	Iowa 9 near Little Rock	Little Rock	01930-01-011930	01980-01-011980	Spur route
Iowa 179	0.82	1.32	US 69 near Klemme	Klemme	01930-01-011930	01980-01-011980	Spur route
Iowa 180	2.46	3.96	Hayesville	Iowa 149 near Hayesville	01930-01-011930	01980-01-011980	Spur route
Iowa 181	3	5	Riverside	US 161 near Riverside	01930-01-011930	01931-01-011931	Spur route; replaced by an extended Iowa 22
Iowa 181	9.596	15.443	Iowa 5 / Iowa 92 near Pleasantville	Melcher-Dallas	01931-01-011931	02003-01-012003	Spur route
Iowa 182	11.44[5]	18.41	Iowa 9 in Lansing	MN 26 at New Albin	01930-01-011930	01968-12-311968	Renumbered Iowa 26
Iowa 182	9.051	14.566	US 18 in Inwood	Iowa 9 near Larchwood	01969-01-011969	current
Iowa 183	29.952	48.203	Iowa 127 near Mondamin	Iowa 141 in Ute	01930-01-011930	current	Continued south to US 6 until 1981, and to Council Bluffs city limits until 2003
Iowa 184	26	42	Blockton	US 34 near Creston	01930-01-011930	01932-01-011932	Spur route; replaced by an extended Iowa 25
Iowa 184	15.026	24.182	US 275 near Randolph	US 59 near Randolph	01934-01-011934	02003-01-012003	Originally a spur route from US 275 to Randolph
Iowa 185	1.51[24]	2.43	Iowa 14 near Conrad	Conrad	01934-01-011934	01978-01-011978	Spur route
Iowa 186	3.27	5.26	US 34 near Prescott	Prescott	01930-01-011930	01980-01-011980	Spur route
Iowa 186	3.375[25]	5.432	Green Valley State Park	Iowa 25 in Creston	01980-01-011980	02001-01-012001	Park access road
Iowa 187	9	14	Iowa 10 in Alton	Hospers	01930-01-011930	01931-01-011931	Spur route; replaced by Iowa 33
Iowa 187	28.385	45.681	US 20 near Masonville	Iowa 150 near Fayette	01931-01-011931	current	Originally was a park access road to Backbone State Park; moved to current route in 1980
Iowa 188	26[10]	42	US 52 / Iowa 10 at Luxemburg	US 161 at Cascade	01930-01-011930	01938-01-011938	Replaced by an extended Iowa 136
Iowa 188	13	21	US 71 at Auburn	Iowa 17 near Lake City	01938-01-011938	01940-01-011940	Formerly No. 35 and Iowa 151; replaced by an extended Iowa 175
Iowa 188	24.231	38.996	Iowa 3 near Clarksville	US 63 near Tripoli	01945-01-011945	current
Iowa 189	1.00	1.61	Bridgewater	Iowa 92 north or Bridgwater	01930-01-011930	01980-01-011980	Spur route
Iowa 190	10	16	Ashton	Iowa 9 in Sibley	01930-01-011930	01931-01-011931	Spur route; replaced by Iowa 33
Iowa 190	7.46	12.01	Fairbank	Iowa 150 near Oelwein	01931-01-011931	01980-01-011980	Replaced by Iowa 281
Iowa 191	22.790	36.677	I-680 near Neola	Iowa 37 at Earling	01930-01-011930	current	continued south to US 6 until 1981, and to Council Bluffs city limits until 2003
Iowa 192	10	16	US 75 in Sloan	Iowa 141 near Hornick	01930-01-011930	01931-01-011931	Became part of an extended Iowa 140
Iowa 192	5.090	8.192	I-29 / I-80 at Council Bluffs	I-29 at Council Bluffs	01931-01-011931	02017-01-012017	Renumbered from Iowa 241; was decommissioned in 1975, but restored in 1980; truncated in 2016
Iowa 193	10.852	17.465	US 18 in Fayette County	Iowa 24 in Jackson Junction	01930-01-011930	02003-01-012003
Iowa 194	0.86[6]	1.38	Iowa 2 in Clarinda	Clarinda Treatment Center	01930-01-011930	01958-01-011958	Hospital access road
Iowa 195	3[10]	5	US 69 in Jewell	Ellsworth	01930-01-011930	01935-01-011935	Spur route; became part of an extended Iowa 175
Iowa 195	2.896	4.661	Iowa 4 near Plover	Plover	01935-01-011935	02003-01-012003	Spur route
Iowa 196	1	2	US 20 near Williams	Williams	01930-01-011930	01932-01-011932	Was proposed to replace part of US 20, which was to be shifted south, but the plan to relocate US 20 was abandoned in 1932
Iowa 196	10.136	16.312	US 71 / Iowa 175 near Lake View	US 20 near Sac City	01935-01-011935	02015-01-012015
Iowa 197	7[10]	11	Stratford	Iowa 60 near Stanhope	01930-01-011930	01937-01-011937	Spur route; became part of an extended Iowa 175
Iowa 197	2.567	4.131	Iowa 3 near Albert City	Albert City	01937-01-011937	02003-01-012003	Spur route
Iowa 198	2.231	3.590	Garrison	US 218 near Garrison	01930-01-011930	02003-01-012003	Spur route; section in Garrison removed 1980
Iowa 199	2.666	4.291	Van Horne	US 218 near Van Horne	01930-01-011930	02003-01-012003	Spur route; section in Van Horne removed 1980
Iowa 200	2.163	3.481	US 30 near Keystone	Keystone	01930-01-011930	02003-01-012003	Spur route; section in Keystone removed 1980
Iowa 201	4.755	7.652	Norway	US 30 / US 218 near Atkins	01930-01-011930	02003-01-012003	Spur route
Iowa 202	8.13[5]	13.08	US 218	Shellsburg	01930-01-011930	01967-01-011967	Spur route
Iowa 202	10.461	16.835	Route 202 at Coatsville, Mo	Iowa 2 near Moulton	01969-01-011969	current	Formerly Iowa 142
Iowa 203	8.78	14.13	Terril	Iowa 9	01930-01-011930	01980-01-011980	Spur route
Iowa 204	5.407	8.702	Iowa 2 near Garden Grove	Garden Grove	01930-01-011930	02003-01-012003	Spur route
Iowa 205	2.927	4.711	US 65 near Milo	Milo	01930-01-011930	02003-01-012003	Spur route
Iowa 206	6.221	10.012	US 65 near Liberty Center	Liberty Center	01930-01-011930	02003-01-012003	Spur route
Iowa 207	3.058	4.921	I-35 near New Virginia	New Virginia	01930-01-011930	02003-01-012003	Spur route
Iowa 208	14	23	US 20	Backbone State Park	01930-01-011930	01931-01-011931	Park access road; renumbered Iowa 187
Iowa 208	11.83[22]	19.04	Iowa 2	Blanchard	01931-01-011931	01974-01-011974	Spur route
Iowa 209	0.66[18]	1.06	Iowa 149 near Conroy	Conroy	01931-01-011931	01976-01-011976	Spur route
Iowa 210	34.781	55.975	Iowa 141 near Woodward	US 65 near Collins	01931-01-011931	current	Originally a double spur route from Slater to Maxwell; extended in 1980
Iowa 211	1.63	2.62	Cambridge	Iowa 210 near Cambridge	01931-01-011931	01980-01-011980	Spur route
Iowa 212	20	32	Iowa 8 in Dysart	US 30 in Belle Plaine	01931-01-011931	01933-01-011933	Replaced by an extended Iowa 73, which was renumbered Iowa 212 9 months later; this portion became part of Iowa 21 a month later
Iowa 212	12.157	19.565	Iowa 21 near Belle Plaine	US 6 at Marengo	01934-01-011934	current	continued northwest to US 30 from 1937 to 1980
Iowa 213	3.72	5.99	Blakesburg	US 34 north of Blakesburg	01931-01-011931	01980-12-011980	Spur route
Iowa 214	5.736	9.231	Iowa 175 near Ivester	Wellsburg	01931-01-011931	02003-01-012003	Spur route
Iowa 215	8.738	14.062	Union	Iowa 175 in Eldora	01931-01-011931	02003-01-012003	Spur route
Iowa 216	1.70[15]	2.74	Iowa 5	Exline	01931-01-011931	01981-01-011981	Spur route
Iowa 217	4.96[17]	7.98	Breda	US 71	01931-01-011931	01989-01-011989	Spur route
Iowa 219	1.53	2.46	Iowa 9 near Lake Park	Lake Park	01931-01-011931	01980-12-011980	Spur route
Iowa 220	7.233	11.640	US 6 at South Amana	US 151 at Amana	01931-01-011931	current	Continued east to East Amana and south to Upper South Amana until 1980
Iowa 221	11[10]	18	US 71 near Albert City	Albert City	01931-01-011931	01937-01-011937	Spur route
Iowa 221	42.61[8]	68.57	Iowa 5 near Cherokee	Iowa 17 / Iowa 10 at Pocahontas	01937-01-011937	01945-01-011945	Extended in both directions and renumbered Iowa 3
Iowa 221	3.909	6.291	I-35 near Story City	Roland	01947-01-011947	02003-01-012003	Spur route; section from I-35 to US 69 removed 1980
Iowa 222	15.12	24.33	Iowa 15 near Ottosen	Livermore	01931-01-011931	01980-01-011980	Spur route
Iowa 223	12.22[9]	19.67	Iowa 330 near Baxter	Iowa 14 near Baxter	01931-01-011931	01997-01-011997	Originally a spur route; extended west from Baxter in 1980
Iowa 224	10.587	17.038	US 6 near Kellogg	Iowa 14 near Laurel	01931-01-011931	current	Originally a spur route; extended north from Kellogg in 1980
Iowa 225	7.688	12.373	Sully	Iowa 146 in Searsboro	01931-01-011931	02003-01-012003	Spur route
Iowa 226	10.78	17.35	US 18	Titonka	01931-01-011931	01980-12-011980	Spur route
Iowa 227	5.39[26]	8.67	US 218 near Stacyville	Stacyville	01931-01-011931	01991-01-011991	Spur route
Iowa 228	0.85[19]	1.37	US 6 (this section became County Road F58 in 2003) near Walcott	Walcott	01931-01-011931	01964-01-011964	Spur route
Iowa 229	5.233	8.422	Garwin	US 63 in Tama County	01931-01-011931	02003-01-012003	Spur route
Iowa 230	1[10]	2	Sergeant Bluff	US 75 near Sergeant Bluff	01931-01-011931	01934-01-011934	Spur route; decommissioned because US 75 was rerouted through Sergeant Bluff, and Iowa 230 was reassigned to the old route of US 75; part later restored as Iowa 378 in 1942
Iowa 230	8.60[19]	13.84	US 75 near Sergeant Bluff	US 75 in Sioux City	01934-01-011934	01965-01-011965	Spur route
Iowa 231	1.83[15]	2.95	Iowa 10 near Ireton	Ireton	01931-01-011931	01981-01-011981	Spur route
Iowa 231	4.068	6.547	US 34 west of New London	US 34 east of New London	02000-01-012000	02003-01-012003	Former section of US 34
Iowa 232	1.99	3.20	Earlham	I-80 near Earlham	01931-01-011931	01980-01-011980	Spur route
Iowa 233	5.30[17]	8.53	Albion	Iowa 14 near Rhodes	01931-01-011931	01989-01-011989	Spur route; became part of relocated Iowa 330
Iowa 234	6.72[17]	10.81	US 30 in State Center	Iowa 330 near Rhodes	01931-01-011931	01994-01-011994	Originally a spur route; only the section north of CR E63 remained after 1989
Iowa 235	3	5	Iowa 234 near Rhodes	Rhodes	01931-01-011931	01935-01-011935	Spur route
Iowa 235	1.24[5]	2.00	Rhodes	Iowa 234 near Rhodes	01935-01-011935	01966-01-011966	Spur route; renumbered Iowa 245 when I-235 was designated
Iowa 236	1.18[20]	1.90	Templeton	US 71 / Iowa 141 near Templeton	01931-01-011931	01987-01-011987	Spur route
Iowa 237	1.41	2.27	Iowa 9 near Ocheyedan	Ocheyedan	01931-01-011931	01981-01-011981	Spur route; section in Ocheyedan removed in 1980
Iowa 238	1.063	1.711	Iowa 9 near Harris	Harris	01931-01-011931	02003-01-012003	Spur route; was decommissioned in 1981, but was restored in 1987
Iowa 239	0.510	0.821	Waubonsie State Park	Iowa 2 in Fremont County	01931-01-011931	02003-01-012003	Park access road
Iowa 240	6.389	10.282	Royal	US 71 in Clay County	01931-01-011931	02003-01-012003	Spur route
Iowa 241	5	8	US 34 / US 275 at Council Bluffs	US 34 / US 275	01931-01-011931	01931-01-011931	Renumbered Iowa 192
Iowa 241	0.99	1.59	Readlyn	Iowa 3 near Readlyn	01931-01-011931	01980-01-011980	Spur route
Iowa 242	5.855	9.423	US 34 in Mills County	Silver City	01931-01-011931	02003-01-012003	Spur route
Iowa 243	7.97	12.83	Iowa 140 near Kingsley	Pierson	01931-01-011931	01980-01-011980	Spur route
Iowa 243	0.559	0.900	Black Hawk Lake State Park	US 71 / Iowa 175 near Wall Lake	01980-01-011980	02003-01-012003	Park access road
Iowa 244	1.96	3.15	Henderson	US 59	01931-01-011931	01980-01-011980	Spur route
Iowa 244	0.771	1.241	I-80 near Neola	Iowa 191 in Neola	01980-01-011980	02003-01-012003
Iowa 245	1.54[16]	2.48	Iowa 9 near Estherville	Fort Defiance State Park	01931-01-011931	01961-01-011961	Park access road
Iowa 245	1.24[17]	2.00	Rhodes	Iowa 234 near Rhodes	01966-01-011966	01990-01-011990	Spur route; portion outside of Rhodes removed in 1989
Iowa 246	3.26	5.25	US 61 in Zwingle	La Motte	01931-01-011931	01981-01-011981	Spur route; section outside La Motte deleted in 1980
Iowa 247	0.68[19]	1.09	Chelsea	Iowa 212 near Chelsea	01931-01-011931	01963-01-011963	Spur route
Iowa 248	0.54	0.87	Independence State Hospital	US 20 in Independence	01931-01-011931	01980-01-011980	Hospital access road
Iowa 249	0.665	1.070	Iowa 78 near Winfield	Winfield	01931-01-011931	02003-01-012003	Spur route
Iowa 250	0.59	0.95	Lakota	US 169 / Iowa 9 near Lakota	01932-01-011932	01980-01-011980	Spur route
Iowa 251	1.71	2.75	St. Charles	I-35 near St. Charles	01932-01-011932	01980-01-011980	Spur route
Iowa 252	0.584	0.940	US 61 / Iowa 92 near Grandview	Grandview	01932-01-011932	02003-01-012003	Spur route
Iowa 253	0.932	1.500	Iowa 14 near Williamson	Williamson	01932-01-011932	02003-01-012003	Spur route
Iowa 254	0.45[5]	0.72	Iowa 92 at Massena	Massena	01932-01-011932	01968-12-311968	Spur route; renumbered Iowa 322
Iowa 254	7.91	12.73	Iowa 9 near Buffalo Center	MN 254 near Rake	01969-01-011969	01980-01-011980	Spur route; formerly Iowa 322
Iowa 254	2.7	4.3	dead end northwest of Nashua	dead end southeast of Nashua	02003-01-012003	02004-01-012004	Former section of US 218
Iowa 255	2.26	3.64	Orchard	US 218 near Orchard	01932-01-011932	01980-01-011980	Spur route
Iowa 256	0.80	1.29	Iowa 17 near Corwith	Corwith	01932-01-011932	01980-01-011980	Spur route
Iowa 257	0.58[16]	0.93	US 18 near Dickens	Dickens	01933-01-011933	01960-01-011960	Spur route
Iowa 258	1.989	3.201	I-35 near Van Wert	US 69 near Van Wert	01933-01-011933	02003-01-012003	Originally a spur route
Iowa 259	1.001	1.611	US 169 near Tingley	Tingley	01933-01-011933	02003-01-012003	Spur route; section in Tingley removed 1980
Iowa 260	2.12[24]	3.41	Shannon City	US 169 near Shannon City	01933-01-011933	01977-01-011977	Spur route
Iowa 261	33.02[16]	53.14	Iowa 1 in Iowa City	US 151	01930-01-011930	01962-01-011962	Numbered as a branch of US 161; replaced by relocated Iowa 1
Iowa 262	1.99	3.20	US 69 near Galt	Galt	01933-01-011933	01980-01-011980	Spur route
Iowa 263	2.14	3.44	Coulter	Latimer	01933-01-011933	01980-01-011980	Double spur route with Iowa 3
Iowa 263	12.511	20.135	Iowa 14 in Grundy County	US 20 near Cedar Falls	02000-01-012000	02003-01-012003	Former section of US 20
Iowa 264	2.39	3.85	Linn Grove	Iowa 10 near Linn Grove	01933-01-011933	01980-01-011980	Spur route
Iowa 265	2.08[16]	3.35	Kent	US 34 near Kent	01934-01-011934	01961-01-011961	Spur route
Iowa 266	1.709	2.750	US 69 near Weldon	Weldon	01934-01-011934	02003-01-012003	Spur route; section in Weldon removed 1980
Iowa 267	1.19	1.92	Iowa 93 near Randalia	Randalia	01934-01-011934	01980-01-011980	Spur route
Iowa 268	6.29[13]	10.12	US 59 near Irwin	Irwin	01934-01-011934	01971-01-011971	Spur route; became part of an extended Iowa 37
Iowa 269	3.01	4.84	Iowa 16 near Stockport	Stockport	01934-01-011934	01980-01-011980	Spur route
Iowa 270	1.80	2.90	Iowa 16 near Hillsboro	Hillsboro	01934-01-011934	01980-01-011980	Spur route
Iowa 271	7[10]	11	Marne	US 71 in Atlantic	01934-01-011934	01935-01-011935	Spur route; replaced by an extended Iowa 83
Iowa 271	0.84	1.35	Iowa 4 near Yale	Yale	01935-01-011935	01980-01-011980	Spur route
Iowa 272	6.45[26]	10.38	Elma	US 63 near Elma	01934-01-011934	01992-01-011992	Spur route; formerly Iowa 52
Iowa 273	10.025	16.134	Lake Wapello State Park	US 63 near Drakesville	01935-01-011935	02003-01-012003	Park access road
Iowa 274	1.99[12]	3.20	Ambrose A. Call State Park	US 169 near Algona	01934-01-011934	01986-01-011986	Park access road; formerly Iowa 163
Iowa 276	4.711	7.582	Spirit Lake city limits	Minnesota state line	01934-01-011934	02003-01-012003	Park access road
Iowa 277	6.24	10.04	Numa	Iowa 5 near Centerville	01935-01-011935	01980-01-011980	Spur route
Iowa 278	2.05	3.30	Rathbun	Iowa 5 near Rathbun	01935-01-011935	01980-01-011980	Spur route
Iowa 279	1.983	3.191	US 30 / US 218 near Atkins	Atkins	01935-01-011935	02003-01-012003	Spur route; section in Atkins removed 1980
Iowa 280	2.62[19]	4.22	US 30 / US 218 near Newhall	Newhall	01935-01-011935	01965-01-011965	Spur route; renumbered Iowa 287 when I-280 was designated
Iowa 281	28.166	45.329	Waterloo city limits	Iowa 150 at Oelwein	01935-01-011935	current	Originally a spur route east to Dunkerton; extended in 1980
Iowa 282	5.283	8.502	Quasqueton	Iowa 939 near Winthrop	01935-01-011935	02003-01-012003	Spur route
Iowa 283	5.861	9.432	Brandon	Iowa 150 near Brandon	01935-01-011935	02003-01-012003	Spur route
Iowa 284	5.58	8.98	Aurora	Iowa 187 at Lamont	01935-01-011935	01980-01-011980	Spur route
Iowa 285	0.796	1.281	US 30 in Arcadia	Arcadia	01935-01-011935	02003-01-012003	Spur route
Iowa 286	9.932	15.984	US 30 in Glidden	Lanesboro	01935-01-011935	02003-01-012003	Spur route
Iowa 287	7.52[4]	12.10	Farnhamville	Iowa 47 in Farnhamville	01935-01-011935	01940-01-011940	Spur route; replaced by an extended Iowa 175
Iowa 287	6.19[19]	9.96	Bradgate	Iowa 3 in Gilmore City	01942-01-011942	01965-01-011965	Spur route
Iowa 287	1.833	2.950	US 30 / US 218 near Newhall	Newhall	01965-01-011965	02003-01-012003	Spur route; section in Newhall removed 1980
Iowa 288	4.58	7.37	US 65 near Manly	Plymouth	01935-01-011935	01980-01-011980	Spur route
Iowa 289	6.14	9.88	Alta Vista	US 63 near Lourdes	01935-01-011935	01980-01-011980	Spur route
Iowa 289	2.252	3.624	US 61 near Fort Madison	US 61 near Fort Madison	02000-01-012000	02003-01-012003	Former section of US 61 southwest of Fort Madison; had two sections
Iowa 290	1.99	3.20	Farmersburg	Iowa 13 near Farmersburg	01935-01-011935	01980-01-011980	Spur route
Iowa 291	1.01	1.63	Low Moor	US 30 near Low Moor	01935-01-011935	01979-01-011979	Spur route
Iowa 292	3.17	5.10	Linden	Iowa 44	01935-01-011935	01980-01-011980	Spur route
Iowa 293	1.42	2.29	Iowa 90 near Van Meter	Van Meter	01935-01-011935	01980-01-011980	Spur route
Iowa 294	6.147	9.893	Iowa 2 in Decatur County	Grand River	01935-01-011935	02003-01-012003	Spur route
Iowa 295	5.09	8.19	Westgate	Iowa 150 near Maynard	01935-01-011935	01980-01-011980	Spur route
Iowa 296	4.44	7.15	CR C24 near Wadena	Iowa 56 near Wadena	01935-01-011935	01980-01-011980	Spur route
Iowa 296	0.275[25]	0.443	—	—	02000-01-012000	02011-01-012011	Former section of Iowa 28
Iowa 297	4.25[4]	6.84	Alexander	Iowa 10	01935-01-011935	01939-01-011939	Spur route; replaced by an extended Iowa 107
Iowa 297	3.543	5.702	Gilbertville	Raymond	01940-01-011940	02003-01-012003	Double spur with I-380
Iowa 298	4.22[5]	6.79	Iowa 60 near Kamrar	Kamrar	01935-01-011935	01966-01-011966	Spur route; until 1958 went from US 69 to Kamrar
Iowa 299	5.556	8.942	New Providence	Iowa 175 near Eldora	01935-01-011935	02003-01-012003	Spur route
Iowa 300	1.411	2.271	Modale	I-29 near Modale	01935-01-011935	02003-01-012003	Spur route
Iowa 301	2.045	3.291	I-29 near Little Sioux	Little Sioux	01935-01-011935	02003-01-012003	Spur route
Iowa 302	3.00	4.83	Thor	Iowa 3 near Thor	01935-01-011935	01980-01-011980	Spur route
Iowa 303	3.51[15]	5.65	US 34 near Fairfield	Libertyville	01935-01-011935	01981-01-011981	Spur route
Iowa 304	1.59	2.56	Iowa 78 near Ollie	Ollie	01935-01-011935	01980-01-011980	Spur route
Iowa 305	2.554	4.110	Letts	US 61 / Iowa 92 near Letts	01935-01-011935	02003-01-012003	Spur route
Iowa 306	0.783	1.260	US 65 near Derby	Derby	01935-01-011935	02003-01-012003	Spur route
Iowa 307	5.31[18]	8.55	US 169 near East Peru	East Peru	01935-01-011935	01975-01-011975	Spur route; decommissioned when US 169 was rerouted south of Winterset
Iowa 308	7.32[5]	11.78	US 63 near New Sharon	Barnes City	01935-01-011935	01966-01-011966	Spur route
Iowa 309	2.32	3.73	Beacon	Iowa 137 in Oskaloosa	01935-01-011935	01980-01-011980	Spur route
Iowa 310	1.68[5]	2.70	Iowa 92 near Harvey	Harvey	01935-01-011935	01966-01-011966	Spur route
Iowa 311	4.73[17]	7.61	Liscomb	Iowa 14 near Liscomb	01935-01-011935	01989-01-011989	Spur route; section in Liscomb removed 1980
Iowa 312	6.19	9.96	Iowa 9 near Riceville	McIntire	01935-01-011935	01980-01-011980	Spur route
Iowa 312	0.883	1.421	—	—	02002-01-012002	02003-01-012003	Former section of US 65; had two sections
Iowa 313	1.591[25]	2.560	US 59 near Melvin	Melvin	01935-01-011935	02002-01-012002	Spur route; section in Melvin removed 1980
Iowa 314	6.277	10.102	Ayrshire	US 18 near Ruthven	01935-01-011935	02003-01-012003	Spur route
Iowa 315	4.158	6.692	Iowa 4 near Palmer	Palmer	01935-01-011935	02003-01-012003	Spur route
Iowa 316	5.183	8.341	Iowa 5 near Swan	Runnells city limits	01935-01-011935	current	Spur route; continued south to Iowa 163 from 1981 to 2003
Iowa 317	0.71	1.14	US 65 near Zearing	Zearing	01935-01-011935	01980-01-011980	Spur route; continued west to McCallsburg until 1954
Iowa 318	5.51	8.87	Clutier	Iowa 21 near Clutier	01935-01-011935	01980-01-011980	Spur route
Iowa 319	0.50	0.80	Gravity	Iowa 148 at Gravity	01935-01-011935	01980-01-011980	Spur route; continued east to Conway until 1961
Iowa 320	4.25[19]	6.84	US 169 near Badger	Badger	01935-01-011935	01963-01-011963	Spur route
Iowa 321	6.03[19]	9.70	Clare	Iowa 5 near Clare	01935-01-011935	01963-01-011963	Spur route
Iowa 322	7.91[11]	12.73	Iowa 9 near Buffalo Center	MN 254 near Rake	01935-01-011935	01968-12-311968	Spur route; renumbered Iowa 254
Iowa 322	0.45[13]	0.72	Iowa 92 at Massena	Massena	01969-01-011969	01972-01-011972	Spur route; formerly Iowa 254
Iowa 322	2.660	4.281	Pammel State Park	Iowa 92 in Madison County	01982-01-011982	02003-01-012003	Park access road; formerly Iowa 162
Iowa 323	3.74	6.02	Iowa 17 near Woolstock	Woolstock	01935-01-011935	01980-01-011980	Spur route
Iowa 324	0.79[21]	1.27	Lawton	US 20 near Lawton	01935-01-011935	01954-01-011954	Spur route; decommissioned when US 20 was rerouted closer to Lawton
Iowa 324	0.510	0.821	Iowa 175 near Onawa	Lewis and Clark State Park	01956-01-011956	02003-01-012003	Park access road
Iowa 325	3.617	5.821	Spillville	US 52 near Calmar	01935-01-011935	02003-01-012003	Spur route; section in Spillville removed 1980
Iowa 326	2.18[15]	3.51	Bristow	Iowa 3 near Bristow	01935-01-011935	01981-01-011981	Spur route
Iowa 327	2.070	3.331	Iowa 276 in Spirit Lake	near Orleans	01935-01-011935	02003-01-012003	Spur route
Iowa 328	2.29	3.69	US 20 near Galva	Galva	01935-01-011935	01980-12-011980	Spur route
Iowa 329	4.85	7.81	US 169 at Boxholm	Pilot Mound	01935-01-011935	01980-01-011980	Spur route
Iowa 330	2.31[8]	3.72	Ionia	US 18 near Ionia	01935-01-011935	01948-01-011948	Spur route; renumbered Iowa 393 so Iowa 330 could be reused as a spur of US 30
Iowa 330	47.748	76.843	I-80 / US 6 / US 65 at Altoona	Iowa 14 near Albion	01948-01-011948	current	Originally went from US 30 to Marshalltown; extended west in 1969 and was relocated to bypass Marshalltown in 1989
Iowa 331	1.83[5]	2.95	Eldridge	US 61 near Eldridge	01935-01-011935	01967-01-011967	Spur route
Iowa 331	3.801	6.117	Dead end near I-35 in Des Moines	Iowa 28 in Des Moines	02002-01-012002	02005-01-012005	Former section of Iowa 5
Iowa 332	1.00	1.61	Pilot Knob State Park	Iowa 9 near Forest City	01935-01-011935	01980-01-011980	Park access road
Iowa 333	1.558	2.507	I-29 at Hamburg	US 275 in Hamburg	01935-01-011935	current	Originally a spur route; section from county line to US 71 removed 1980; reassigned to current route that year, but section from US 275 to US 59 removed 2003
Iowa 334	1.87	3.01	US 63 near Frederika	Frederika	01935-01-011935	01980-01-011980	Spur route
Iowa 334	6.600[27]	10.622	—	—	02006-01-012006	02007-01-012007	Former section of US 34
Iowa 335	0.64	1.03	Iowa 141 near Dawson	Dawson	01935-01-011935	01980-01-011980	Spur route
Iowa 335	1.536[25]	2.472	Iowa 163 in Otley	Iowa 163 in Otley	01999-01-011999	02001-01-012001	Former section of Iowa 163
Iowa 336	2.48	3.99	Iowa 150 near Rowley	Rowley	01936-01-011936	01980-01-011980	Spur route
Iowa 337	3.36	5.41	Iowa 9 near Grafton	Grafton	01936-01-011936	01980-01-011980	Spur route
Iowa 337	2.764[25]	4.448	US 218 in Charles City	US 18 in Charles City	02000-01-012000	02001-01-012001	Former section of US 218
Iowa 337	1.085[28]	1.746	US 151 in Langworthy	US 151 in Langworthy	02003-01-012003	02004-01-012004	Former section of US 151
Iowa 338	1.02[13]	1.64	Bondurant	US 65	01936-01-011936	01972-01-011972	Spur route
Iowa 339	6.15[29]	9.90	George	Iowa 9 near George	01936-01-011936	02000-01-012000	Spur route
Iowa 340	2.231	3.590	Pikes Peak State Park	Iowa 76 in McGregor	01936-01-011936	02003-01-012003	Park access road
Iowa 340	1.160[27]	1.867	Dead end in Batavia	US 34 in Batavia	02005-01-012005	02007-01-012007	Former section of US 34
Iowa 341	2.10[20]	3.38	Lost Island Park	US 18 near Ruthven	01936-01-011936	01988-01-011988	Park access road
Iowa 341	0.062	0.100	Ruthven	US 18 near Ruthven	01993-01-011993	02003-01-012003	Spur route; restoration of part of the previous Iowa 341
Iowa 342	0.95	1.53	Iowa 141 near Jamaica	Jamaica	01936-01-011936	01980-01-011980	Spur route
Iowa 342	2.2	3.5	Dead end north of Eddyville	Iowa 137 in Eddyville	02004-01-012004	02005-01-012005	Former section of US 63
Iowa 343	1.01	1.63	Iowa 333 near Northboro	Northboro	01937-01-011937	01980-01-011980	Spur route
Iowa 344	7.06[8]	11.36	Iowa 2 in Bedford	Iowa 319 near Conway	01937-01-011937	01943-01-011943	Park access road; became part of an extended Iowa 49
Iowa 344	1.075[25]	1.730	State fish hatchery	US 169 near Mount Ayr	01943-01-011943	02001-01-012001	Fish hatchery access road
Iowa 345	0.42[16]	0.68	Iowa 17 near Graettinger	Graettinger	01937-01-011937	01960-01-011960	Spur route
Iowa 346	12.470	20.069	US 218 / Iowa 27 at Nashua	US 18 / US 63 near New Hampton	01937-01-011937	current
Iowa 347	1.08[12]	1.74	Locust Street at Omaha, Neb.	Locust Street at Omaha, Neb.	01937-01-011937	01986-01-011986
Iowa 348	0.88[5]	1.42	Iowa 347	Carter Lake	01937-01-011937	01967-01-011967
Iowa 349	1.032	1.661	Lake Ahquabi State Park	US 65 / US 69 near Indianola	01938-01-011938	02003-01-012003	Park access road
Iowa 350	2.55[6]	4.10	US 6 near Davenport	Iowa 122 in Davenport	01938-01-011938	01958-01-011958	Now Hickory Grove Road
Iowa 351	0.86	1.38	Rembrandt	US 71 near Rembrandt	01938-01-011938	01981-01-011981	Spur route; section in Rembrandt removed 1980
Iowa 352	0.75	1.21	Truesdale	US 71 near Truesdale	01938-01-011938	01981-01-011981	Spur route; section in Truesdale removed 1980
Iowa 353	0.35	0.56	Rowan	Iowa 3 at Rowan	01938-01-011938	01980-01-011980	Spur route
Iowa 354	0.35[16]	0.56	Mallard	Iowa 17 near Mallard	01938-01-011938	01960-01-011960	Spur route
Iowa 355	0.33[16]	0.53	Iowa 175 near Radcliffe	Radcliffe	01938-01-011938	01961-01-011961	Spur route
Iowa 356	6.37[15]	10.25	Packwood	Iowa 1 near Packwood	01938-01-011938	01981-01-011981	Spur route; section in Packwood removed 1980
Iowa 356	0.949	1.527	Milford	West Okoboji	02000-01-012000	02003-01-012003	Former section of US 71
Iowa 357	0.59[19]	0.95	Blockton	Iowa 25 near Blockton	01938-01-011938	01964-01-011964	Spur route
Iowa 358	1.55	2.49	Whittemore	US 18 / Iowa 15 near Whittemore	01938-01-011938	01980-01-011980	Spur route
Iowa 359	7.383	11.882	Buckeye	Iowa 941 in Alden	01938-01-011938	02003-01-012003	Spur route
Iowa 360	0.64[19]	1.03	Iowa 5 near Newell	Newell	01938-01-011938	01964-01-011964	Spur route
Iowa 361	0.38[16]	0.61	Bayard	Iowa 25 near Bayard	01938-01-011938	01962-01-011962	Spur route
Iowa 362	1.17	1.88	Macedonia	US 59 near Macedonia	01938-01-011938	01980-01-011980	Spur route
Iowa 362	5.469	8.802	DeSoto National Wildlife Refuge	I-29 at Loveland	01980-01-011980	02003-01-012003	Park access road
Iowa 363	1.616	2.601	Iowa 150 near Urbana	I-380 / Iowa 27 in Urbana	01939-01-011939	02003-01-012003	Spur route; formerly Iowa 92; rerouted to end at I-380 in 1984
Iowa 364	6.140	9.881	Iowa 76 near Waukon Junction	Harpers Ferry	01938-01-011938	02003-01-012003	Spur route; section north of the bridge in Harpers Ferry removed 1980
Iowa 365	1.07	1.72	Tracy	Iowa 964 near Tracy	01939-01-011939	01980-11-011980	Spur route; did not extend to relocated Iowa 92 when Iowa 92 was rerouted in 1978
Iowa 366	0.51[19]	0.82	US 75 near Blencoe	Blencoe	01939-01-011939	01964-01-011964	Spur route
Iowa 367	6	10	Nebraska border	US 275 in Council Bluffs	01939-01-011939	01941-01-011941	Replaced by US 275
Iowa 367	3.39	5.46	Rutland	US 169 near Humboldt	01942-01-011942	01980-01-011980	Spur route
Iowa 368	0.50[19]	0.80	Renwick	Iowa 60 near Renwick	01939-01-011939	01964-01-011964	Spur route
Iowa 368	0.140	0.225	200th Avenue northwest of Hartford	Dead end	02002-01-012002	current	Former section of Iowa 5
Iowa 369	2	3	Iowa 92 near Knoxville	Coal mine	01939-01-011939	01941-01-011941	Now County Road T17
Iowa 369	5.54	8.92	Iowa 2 near Moulton	Unionville	01942-01-011942	01980-01-011980	Spur route
Iowa 370	0.46	0.74	Iowa 57	Dike	01939-01-011939	01952-01-011952	Spur route
Iowa 370	3.265	5.255	N-370 at Bellevue, Neb.	I-29 / US 275 near Council Bluffs	01953-01-011953	02014-01-012014	Originally ended at US 275 (pre-2003 route); decommissioned in 1980, but restored west of I-29 in 1983
Iowa 371	0.715	1.151	Lake Keomah State Park	Iowa 92 near Keomah Village	01939-01-011939	02003-01-012003	Park access road
Iowa 372	2.60[5]	4.18	Preparation Canyon State Park	Iowa 183 near Moorhead	01939-01-011939	01968-01-011968	Park access road
Iowa 373	4.05[19]	6.52	Iowa 13 near Waterville	Waterville	01942-01-011942	01964-01-011964	Spur route
Iowa 373	2.307	3.713	—	—	02002-01-012002	02003-01-012003	Former section of US 61 just southwest of Muscatine
Iowa 374	7.99	12.86	US 71 near Sioux Rapids	Webb	01942-01-011942	01980-01-011980	Spur route
Iowa 374	3.6[30]	5.8	Iowa 163 in Monroe	Dead end in Monroe	02000-01-012000	02000-01-012000	Former section of Iowa 163
Iowa 375	2.95[13]	4.75	US 6 in Council Bluffs	US 275 / Iowa 92 in Council Bluffs	01941-01-011941	01971-01-011971	Now 4th Street, 9th Avenue, 3rd Street, and Harry Langdon Boulevard
Iowa 376	0.46[5]	0.74	Iowa 3 near Colesburg	Colesburg	01942-01-011942	01965-01-011965	Spur route
Iowa 376	10.334	16.631	I-129 / US 20 / US 75 at Sioux City	US 75 at Sioux City	02001-01-012001	current	US 75 Business in Sioux City
Iowa 377	0.55	0.89	Harbor Drive in Sioux City	Iowa 970 in Sergeant Bluff	01942-01-011942	01980-01-011980	Airport access road
Iowa 378	2.13[22]	3.43	Harbor Drive in Sioux City	Iowa 475 (later Iowa 970) in Sergeant Bluff	01942-01-011942	01974-01-011974	Airport access road
Iowa 379	4.59	7.39	Joice	Iowa 105 near Lake Mills	01942-01-011942	01980-01-011980	Spur route
Iowa 380	1.30[11]	2.09	Ottumwa Regional Airport	US 63 near Ottumwa	01943-01-011943	01969-01-011969	Renumbered Iowa 389 when I-380 was designated
Iowa 381	1.10[23]	1.77	Iowa 84 near Cedar Rapids	US 218 (now Club Road) near Cedar Rapids	01943-01-011943	01953-01-011953	Airport access road; now Wright Brothers Boulevard
Iowa 381	0.67	1.08	Iowa 254 near Rake	Rake	01954-01-011954	01980-01-011980	Spur route
Iowa 382	4.792	7.712	Lake MacBride State Park	Iowa 1 in Solon	01943-01-011943	02003-01-012003	Park access road
Iowa 383	1.311	2.110	US 69 near Randall	Randall	01944-01-011944	02003-01-012003	Spur route
Iowa 384	1.231	1.981	Iowa 25 in Guthrie County	Springbrook State Park	01944-01-011944	02003-01-012003	Park access road
Iowa 385	3.151	5.071	Pacific Junction	US 34 / US 275 in Glenwood	01945-01-011945	02003-01-012003	Spur route
Iowa 386	2.685	4.321	US 52 / Iowa 3 near Sageville	US 52 / Iowa 3 / Iowa 32 near Dubuque	01946-01-011946	02003-01-012003
Iowa 387	1.04[31]	1.67	US 65 near Zearing	Zearing	01946-01-011946	01950-01-011950	Spur route; replaced by an extended Iowa 317
Iowa 387	0.52	0.84	Davenport Municipal Airport	US 61 3 miles north of Davenport	01951-01-011951	01979-01-011979	Airport access road
Iowa 388	0.35	0.56	Calumet	US 59 at Calumet	01946-01-011946	01980-01-011980	Spur route
Iowa 389	0.82[16]	1.32	Wild Cat Den State Park	Iowa 22	01946-01-011946	01962-01-011962	Park access road
Iowa 389	1.25[9]	2.01	Ottumwa Regional Airport	US 63 near Ottumwa	01969-01-011969	01997-01-011997	Decommissioned when the first section of Ottumwa bypass opened
Iowa 390	0.74[15]	1.19	Marathon	Iowa 10 near Marathon	01946-01-011946	01981-01-011981	Spur route
Iowa 390	2.113	3.401	South of Plainfield	North of Plainfield	02002-01-012002	02003-01-012003	Former section of US 218
Iowa 391	0.50[13]	0.80	Clinton Municipal Airport	US 30 near Clinton	01946-01-011946	01972-01-011972	Airport access road; now 60th Street
Iowa 392	0.63[22]	1.01	Dubuque Regional Airport	US 61 near Dubuque	01946-01-011946	01974-01-011974	Airport access road; now Airport Road
Iowa 392	3.09[29]	4.97	Iowa 163 in Prairie City	Iowa 163 in Prairie City	01998-01-011998	02000-01-012000	Former section of Iowa 163
Iowa 393	2.40	3.86	Ionia	US 18 near Ionia	01948-01-011948	01980-01-011980	Spur route
Iowa 394	2.27	3.65	Iowa 2 near Denmark	Iowa Army Ammunition Plant southern entrance	01948-01-011948	01980-01-011980	Spur route
Iowa 394	10.454	16.824	Route B at St. Francisville, Mo.	US 218 near Donnellson	01980-01-011980	02005-01-012005	Replaced by Iowa 27
Iowa 395	0.53	0.85	Iowa 330 near Melbourne	Melbourne	01948-01-011948	01983-01-011983	Spur route; section in Melbourne removed 1980
Iowa 396	0.89[21]	1.43	Iowa 14 in Newton	US 6 in Newton	01948-01-011948	01954-01-011954	Now 19th Avenue and 8th Street
Iowa 396	0.52	0.84	Iowa 175 near Farnhamville	Farnhamville	01954-01-011954	01980-01-011980	Spur route
Iowa 397	0.69[17]	1.11	Paton	Iowa 144 near Paton	01948-01-011948	01991-01-011991	Spur route
Iowa 398	1.24	2.00	Brooklyn	US 6 near Brooklyn	01956-01-011956	01980-01-011980	Spur route
Iowa 399	0.65[19]	1.05	Iowa 74 near Palo	Palo	01956-01-011956	01964-01-011964	Spur route
Iowa 400	4.54	7.31	Truro	I-35 near Truro	01957-01-011957	01980-01-011980	Spur route; not completed until 1958
Iowa 401	5.32[17]	8.56	Camp Dodge	US 6 in Des Moines	01958-01-011958	01991-01-011991	Replaced by an extended Iowa 28 south of I-80; rest decommissioned
Iowa 402	20.9	33.6	Iowa 8 near Dysart	Iowa 412 in Waterloo	01957-01-011957	01968-12-311968	Replaced by Iowa 21
Iowa 403	0.70	1.13	Cushing	US 20 near Cushing	01958-01-011958	01980-01-011980	Spur route
Iowa 403	0.477	0.768	SD 48 near Akron	Iowa 12 in Akron	01980-01-011980	02003-01-012003
Iowa 404	1.391	2.239	Montrose	US 61 near Montrose	01960-01-011960	02003-01-012003	Spur route
Iowa 404	1.629	2.622	Iowa 3 in Le Mars	US 75 at Le Mars	02006-01-012006	current	Section of US 75 Business in Le Mars
Iowa 405	0.249	0.401	Lone Tree	Iowa 22 near Lone Tree	01958-01-011958	02003-01-012003	Spur route; section in Lone Tree removed 1980
Iowa 406	2.275	3.661	US 34 near West Burlington	Burlington	01957-01-011957	02003-01-012003	Formerly Iowa 80; spur route
Iowa 407	0.47[5]	0.76	Iowa 99 in Oakville	Oakville	01957-01-011957	01967-01-011967	Formerly Iowa 7; spur route
Iowa 408	7.40	11.91	US 169 near Lu Verne	Lu Verne	01957-01-011957	01980-01-011980	Spur route
Iowa 409	0.41[5]	0.66	US 18 near Garner	Garner	01957-01-011957	01968-01-011968	Formerly Iowa 35; spur route
Iowa 410	2.157	3.471	Backbone State Park	Iowa 3 / Iowa 13 near Strawberry Point	01958-01-011958	02003-01-012003	Park access road
Iowa 411	0.98[19]	1.58	US 6 at Marengo	CR F15 north of Marengo	01957-01-011957	01964-01-011964	Spur route
Iowa 412	4.72[14]	7.60	US 63 in Waterloo	US 218 in Waterloo	01960-01-011960	01983-01-011983	San Marnan Drive in Waterloo
Iowa 413	3.95[19]	6.36	US 20 in Fort Dodge	Fort Dodge Airport	01960-01-011960	01980-01-011980	Spur route; continued north to Iowa 320 near Badger until Iowa 320 was decommissioned
Iowa 414	6.12[13]	9.85	US 6 near Lewis	US 71 near Atlantic	01958-01-011958	01972-01-011972	Former section of Iowa 92; was Iowa 100 for a month in 1958
Iowa 415	16.857	27.129	US 6 in Des Moines	Iowa 141 near Granger	01959-01-011959	current
Iowa 416	4.89[11]	7.87	Centralia	US 20	01959-01-011959	01969-01-011969	Former section of US 20; sections were renumbered Iowa 418 and Iowa 420 in 1960
Iowa 417	5.38[5]	8.66	US 67 near Riverdale	US 67 near LeClaire	01960-01-011960	01968-01-011968	Former section of US 67
Iowa 418	0.85[5]	1.37	Farley	US 20	01960-01-011960	01968-01-011968	Former section of US 20
Iowa 419	1.038	1.670	Victor	US 6 / Iowa 21 near Victor	01962-01-011962	02003-01-012003	Spur route
Iowa 420	2.37[11]	3.81	Iowa 136 in Dyersville	US 20	01960-01-011960	01969-01-011969	Former section of US 20
Iowa 421	3.260	5.246	—	—	02000-01-012000	02003-01-012003	Former section of US 61 northeast of Muscatine
Iowa 422	0.52[18]	0.84	US 169 near Burt	Burt	01964-01-011964	01976-01-011976	Spur route; renumbered Iowa 969
Iowa 424	0.44	0.71	Iowa 111 in Britt	US 18 near Britt	01961-01-011961	01980-01-011980	Spur route
Iowa 424	2.802	4.509	South of Swedesburg	US 218 near Olds	01999-01-011999	02003-01-012003	Former section of US 218
Iowa 426	0.52	0.84	Iowa 92 near Rose Hill	Rose Hill	01960-01-011960	01980-01-011980	Former section of Iowa 92
Iowa 428	1.21	1.95	Anamosa	US 151 near Anamosa	01965-01-011965	01980-01-011980	Spur route
Iowa 428	6.140	9.881	Maquoketa Caves State Park	US 61 near Maquoketa	01980-01-011980	02003-01-012003	Park access road
Iowa 431	3.183[25]	5.123	US 218 near Waverly	Iowa 3 in Waverly	01998-01-011998	02001-01-012001	Section of US 218 Business in Waverly
Iowa 431	1.920[32]	3.090	US 30 near Le Grand		02004-01-012004	02014-01-012014	Former section of US 30
Iowa 432	1.9	3.1	Iowa 163 in Oskaloosa	Iowa 92 in Oskaloosa	01998-01-011998	02003-01-012003	Former section of Iowa 163
Iowa 434	8.993[27]	14.473	US 34 in Danville	US 34 in West Burlington	02005-01-012005	02008-01-012008	Former section of US 34
Iowa 437	0.299[33]	0.481	Dead end near Iowa 137 in Eddyville	Dead end near Iowa 342 in Eddyville	02005-01-012005	02008-01-012008	Former section of Iowa 137; abandoned road
Iowa 438	1.052	1.693	US 34 / Iowa 163 at Mount Pleasant	US 218 / Iowa 27 at Mount Pleasant	02003-01-012003	current	Section of US 218 Business in Mount Pleasant
Iowa 450	0.268	0.431	Iowa 10 at Alton	Iowa 60 at Alton	02005-01-012005	current	450th Street
Iowa 460	7.240[27]	11.652	—	—	02004-01-012004	02007-01-012007	Former sections of US 218 and Iowa 394 in Donnellson and Argyle
Iowa 461	10.750	17.300	I-280 / US 61 at Davenport	I-80 / US 61 at Davenport	02010-01-012010	current	US 61 Business in Davenport
Iowa 463	2.3	3.7	US 63 near Frederika	US 63 near Frederika	02009-01-012009	02010-01-012010	Former section of US 63
Iowa 470	0.695	1.118	US 75 in Merrill		02011-01-012011	current	Former section of US 75
Iowa 471	11.160	17.960	Iowa 175 near Lake View	US 20 / US 71 near Early	02015-01-012015	current	Formerly US 71 in Sac County
Iowa 475	31.79[34]	51.16	Business US 75 in Sioux City	Iowa 175 in Onawa	01969-01-011969	01976-01-011976	Former section of US 75; renumbered Iowa 970
Iowa 478	0.755	1.215	Iowa 24 in New Hampton	North of New Hampton	02002-01-012002	02003-01-012003	Former section of US 63
Iowa 903	0.132	0.212	—	—	02011-01-012011	current	Former section of Iowa 163
Iowa 904	4.737	7.623	US 34 / Iowa 163 west of Fairfield	US 34 / Iowa 163 east of Fairfield	02008-01-012008	02011-01-012011	US 34 Business at Fairfield, did not count mileage within Fairfield city limits
Iowa 906	4.009	6.452	Iowa 192 in Council Bluffs	I-80 / US 6 near Council Bluffs	02016-01-012016	current	Formerly US 6 through Council Bluffs
Iowa 912	0.22[29]	0.35	—	—	01997-01-011997	01999-01-011999	Former section of Iowa 141
Iowa 913	1.686[9]	2.713	—	—	01996-01-011996	01997-01-011997	Former section of US 61
Iowa 914	1.01[25]	1.63	Storm Lake city limit boundary	Iowa 7 in Storm Lake	01996-01-011996	02001-01-012001	Former section of US 71
Iowa 915	0.27[17]	0.43	Iowa 3 / Iowa 150 in Oelwein	Iowa 3 / Iowa 150 in Oelwein	01986-01-011986	01990-01-011990	Former section of Iowa 3/Iowa 150 concurrency
Iowa 915	3.7[35]	6.0	—	—	01993-01-011993	01994-01-011994	Former section of Iowa 415 in Ankeny
Iowa 915	0.580[9]	0.933	Iowa 5 in Albia	Iowa 5 in Albia	01995-01-011995	01997-01-011997	Former section of Iowa 5
Iowa 916	1.293	2.081	Iowa 281 in Oelwein	Oelwein city limits	01986-01-011986	02003-01-012003	Originally ended at Iowa 915 in Oelwein; former section of Iowa 150
Iowa 917	0.149	0.240	US 61 and Iowa 22 near Muscatine	Muscatine city limits	01986-01-011986	02003-01-012003	Former section of Iowa 22
Iowa 918	1.119	1.801	Iowa 16 near Eldon	Iowa 16 in Eldon	01984-01-011984	02003-01-012003	Former section of Iowa 16; street signs said "Hwy 918"
Iowa 919	0.39[36]	0.63	Iowa 363 in Urbana	Walnut Street in Urbana	01984-01-011984	01995-01-011995	Former section of Iowa 363; now Ash Street and Wood Street
Iowa 920	12.560	20.213	Center Point	Iowa 150 near Urbana	01984-01-011984	02003-01-012003	Former section of Iowa 150
Iowa 921	11.75[12]	18.91	Iowa 920 in Center Point	Hiawatha	01984-01-011984	01985-01-011985	Former section of Iowa 150
Iowa 921	2.505	4.031	US 6 / Iowa 1 in Iowa City	US 218 in Iowa City	01985-01-011985	02003-01-012003	Former section of US 218
Iowa 922	1.27[12]	2.04	US 61 in Muscatine	Iowa 22 in Muscatine	01984-01-011984	01986-01-011986	Former section of US 61; became part of an extended Iowa 38
Iowa 922	—	—	Iowa 149 in North English	unnamed street in North English	01987-01-011987	01988-01-011988	Former section of Iowa 149
Iowa 922	8.862	14.262	US 151 at Cedar Rapids	Iowa 100 in Cedar Rapids	01989-01-011989	current	US 151 Business in Cedar Rapids
Iowa 923	8.819	14.193	—	—	01982-01-011982	02003-01-012003	Former section of US 218; had three sections
Iowa 924	4.00[15]	6.44	Iowa 175 near Farnhamville	Webster–Greene County Line	01980-01-011980	01982-01-011982	Now County Road P29
Iowa 924	2.24[26]	3.60	US 52 in Dubuque	Dead end in Dubuque	01983-01-011983	01992-01-011992	Former section of US 61/US 151 concurrency
Iowa 924	0.665	1.070	US 61 near Montrose	Dead end in Montrose	01994-01-011994	02003-01-012003	Formerly Iowa 998; former section of US 61
Iowa 925	26.259	42.260	I-80 / US 6 in Adair	US 6 near Dexter	01980-01-011980	02003-01-012003	Former section of US 6
Iowa 926	3.18[20]	5.12	US 6	Altoona east city limit boundary	01980-01-011980	01988-01-011988	Former section of US 6; originally continued east to Newton
Iowa 926	3.147	5.065	US 169 / US 20 Bus at Fort Dodge	US 169 at Fort Dodge	01990-01-011990	02014-01-012014
Iowa 927	19.017	30.605	US 6 / Iowa 38 in Wilton	I-280 / US 6 near Davenport	01980-01-011980	02003-01-012003	Former section of US 6; was signed in 1989
Iowa 928	20.168	32.457	Iowa 17 near Webster City	CR D20 near Williams	01980-01-011980	02003-01-012003	Former section of US 20
Iowa 929	0.789	1.270	Murray city limits	Maple Street in Murray	01980-01-011980	02003-01-012003	Former section of Iowa 152
Iowa 930	1.738	2.797	US 30 near Ames	Boone–Story county line	01972-01-011972	current	Former section of US 30
Iowa 931	1.2	1.9	Iowa 13 in Coggon	Iowa 13 near Coggon	01976-01-011976	01978-01-011978	Former section of Iowa 13
Iowa 931	8.962	14.423	I-35 in Ankeny	US 65 in Polk County	01980-01-011980	02003-01-012003
Iowa 932	0.193	0.311	Ryan city limits	Iowa 13 in Ryan	01976-01-011976	02003-01-012003	Former section of Iowa 13
Iowa 933	0.74[14]	1.19	Iowa 141 in Perry	Iowa 141 in Perry	01976-01-011976	01984-01-011984	Former section of Iowa 141
Iowa 933	0.21[29]	0.34	—	—	01985-01-011985	01999-01-011999	Former section of Iowa 58 just south of US 20
Iowa 934	1.07[7]	1.72	US 61 near Burlington	US 61 near Burlington	01976-01-011976	01980-01-011980	Former section of US 61; now Memorial Park Road
Iowa 934	1.14[17]	1.83	Dallas–Polk county line	I-35 in Des Moines	01981-01-011981	01989-01-011989	Former section of Iowa 90
Iowa 934	4.76[26]	7.66	US 20 near Moorland	US 169 in Fort Dodge	01990-01-011990	01991-01-011991	Former section of US 20
Iowa 934	0.19[37]	0.31	—	—	01992-01-011992	01994-01-011994	Former section of US 34 just east of Iowa 97, which is now County Road S56
Iowa 934	4.881	7.855	Iowa 58 in Cedar Falls	US 63 in Waterloo	01998-01-011998	02016-01-012016	Was an unsigned highway
Iowa 935	0.77[15]</ref>	1.24	—	—	01976-01-011976	01981-01-011981	Former section of US 34 parallel to Business US 34 in Burlington
Iowa 935	1.492	2.401	I-29	Mills–Pottawattamie county line	01982-01-011982	02003-01-012003	Former section of Iowa 370
Iowa 936	0.087[36]	0.140	east city limits of West Burlington	west city limits of Burlington	01976-01-011976	01995-01-011995	Former section of Iowa 406
Iowa 936	0.275	0.443	Iowa 92 near Ainsworth	Iowa 923 near Ainsworth	01997-01-011997	02003-01-012003	Former section of Iowa 92
Iowa 937	4.23[24]	6.81	Iowa 2 near Bloomfield	Iowa 2 near Bloomfield	01976-01-011976	01977-01-011977	Former section of Iowa 2
Iowa 937	0.460	0.740	Iowa 141 near Perry	US 169 near Perry	01977-01-011977	02003-01-012003	Former section of Iowa 141
Iowa 938	1.57[7]	2.53	Iowa 947 near Manchester	Manchester Fish Hatchery	01976-01-011976	01980-01-011980	Former Iowa 116
Iowa 938	0.460	0.740	Union Street in Unionville	Unionville south city limit boundary	01980-01-011980	02003-01-012003	Former section of Iowa 369
Iowa 939	6.76[7]	10.88	US 65	Iowa 2 near Corydon	01976-01-011976	01980-01-011980	Former section of Iowa 2
Iowa 939	18.931	30.466	Iowa 187 near Masonville	Black Hawk–Buchanan county line	01980-01-011980	02003-01-012003	Former section of US 20
Iowa 940	2.51[7]	4.04	—	—	01976-01-011976	01980-01-011980	Former sections of Iowa 2 at County Road S70, County Road T14, and in Centerville
Iowa 940	0.081	0.130	Tama–Benton county line near Belle Plaine	Iowa 21 near Belle Plaine	01981-01-011981	02003-01-012003
Iowa 941	2.99[7]	4.81	County Road J18 in Moravia	Iowa 5 near Moravia	01976-01-011976	01980-01-011980	Former section of Iowa 5
Iowa 941	6.38[12]	10.27	US 30 / US 218 in Cedar Rapids	US 30 / US 218 in Cedar Rapids	01981-01-011981	01987-01-011987	Former section of US 30/US 218 concurrency
Iowa 941	1.12[17]	1.80	5th Avenue Southwest in Epworth	Bierman Road in Epworth	01988-01-011988	01990-01-011990	Former section of US 20
Iowa 941	12.953	20.846	I-35 near Williams	Iowa Falls city limits	01991-01-011991	02003-01-012003	Former section of US 20
Iowa 942	5.70[7]	9.17	Iowa 5 near Moravia	County Road J18 in Moravia	01976-01-011976	01980-01-011980	Former section of Iowa 5; had another section south of Albia
Iowa 942	0.466	0.750	Vine Street in Woodburn	Woodburn city limits	01980-01-011980	02003-01-012003	Former section of Iowa 104
Iowa 943	0.69[7]	1.11	—	—	01974-01-011974	01980-01-011980	Former section of Iowa 13 in Central City
Iowa 943	0.43[20]	0.69	1st Street in Galva	Galva city limits	01980-01-011980	01987-01-011987	Former section of Iowa 328
Iowa 943	0.48[17]	0.77	—	—	01988-01-011988	01990-01-011990	Former Iowa 12 ramp in Sioux City; road destroyed 1990s
Iowa 943	1.82[36]	2.93	US 63 in Denver	US 63 in Denver	01994-01-011994	01995-01-011995	Former section of US 63
Iowa 944	0.99[7]	1.59	Iowa 13 in Manchester	Iowa 13 in Manchester	01976-01-011976	01980-01-011980	Former section of Iowa 13
Iowa 944	0.553	0.890	US 61 / Iowa 2 in Fort Madison	Fort Madison city limits	01980-01-011980	02003-01-012003	Former section of Iowa 88
Iowa 945	0.3	0.5	—	—	01979-01-011979	01980-01-011980	Lee County; location unknown
Iowa 945	4.599	7.401	I-80 near Altoona	Iowa 931 in Polk County	01980-01-011980	02003-01-012003
Iowa 946	2.72[7]	4.38	Luana city limits	US 18 / US 52 in Monona	01976-01-011976	01980-01-011980	Former section of US 18/US 52 concurrency; had two sections separated by the city limits of Monona
Iowa 946	0.07[17]	0.11	US 218 in St. Ansgar	Park Street in St. Ansgar	01988-01-011988	01989-01-011989	Former section of US 218
Iowa 946	0.927	1.492	US 52 / US 61 / US 151 in Dubuque	US 52 / US 61 / US 151 in Dubuque	01991-01-011991	current	Provides direct access between US 20 and US 52 / US 61 / US 151
Iowa 947	23.75[7]	38.22	Iowa 187	Dyersville city limits	01976-01-011976	01981-01-011981	Former section of US 20
Iowa 947	0.45[12]	0.72	Zearing city limits	Pearl Street in Zearing	01981-01-011981	01986-01-011986	Former section of Iowa 317
Iowa 947	4.74[12]	7.63	Iowa 57 in Cedar Falls	Greenhill Road in Waterloo	01989-01-011989	01992-01-011992	Former section of US 218
Iowa 947	2.47[9]	3.98	Iowa 70 in Columbus Junction	Market Street in Columbus City	01994-01-011994	02003-01-012003	Former section of Iowa 70; only the 0.671 miles in Columbus City were left on December 1, 1997
Iowa 948	5.08[20]	8.18	DeWitt city limits	US 30 near DeWitt	01975-01-011975	01987-01-011987	Former section of US 30
Iowa 948	0.30[37]	0.48	US 61 / US 151 in Dubuque	Iowa 959 in Dubuque	01992-01-011992	01993-01-011993	Former section of US 61/US 151 concurrency
Iowa 949	2.275	3.661	Glenwood city limits	US 34 / US 275 near Glenwood	01974-01-011974	02003-02-182003	Formerly US 34 Business
Iowa 950	3.45[37]	5.55	US 6 / US 65 in Altoona	iowa 163 in Pleasant Hill	01980-01-011980	01994-01-011994	Now 34th Avenue/56th Street
Iowa 951	2.65[7]	4.26	US 34 west of Osceola	US 34 near Osceola	01976-01-011976	01980-01-011980	Former section of US 34
Iowa 951	3.15[37]	5.07	Carbon city limits	Iowa 148	01983-01-011983	01993-01-011993	Former Section of Iowa 95
Iowa 952	1.8	2.9	US 61 in Burlington	Central avenue in Burlington	01976-01-011976	01976-01-011976	Former section of US 34
Iowa 952	0.18[14]	0.29	—	—	01978-01-011978	01982-01-011982	Former section of US 67 north of Clinton
Iowa 952	0.112	0.180	US 151 near Cascade	Reiter Road near Cascade	01992-01-011992	02003-01-012003	Former section of US 151
Iowa 953	0.89[7]	1.43	Iowa 38 near Muscatine	Iowa 38 in Muscatine	01976-01-011976	01980-01-011980	Former section of Iowa 38
Iowa 953	0.08[37]	0.13	Iowa 149 in North English	Dead end in North English	01988-01-011988	01994-01-011994	Former section of Iowa 149
Iowa 953	1.0[37]	1.6	Iowa 5 in West Des Moines	Browns Woods Road in West Des Moines	01995-01-011995	01996-01-011996	Former section of Iowa 28
Iowa 954	0.773	1.244	US 61 near Maquoketa	Maquoketa city limits	01967-01-011967	02003-01-012003	Former section of US 61; numbered 1976
Iowa 955	0.727	1.170	US 61 near Key West	Iowa 963 (Military Road) in Key West	01971-01-011971	02003-01-012003	Former section of US 61
Iowa 956	16.776	26.998	CR F55 at Davenport	US 61 north of DeWitt	01976-01-011976	02003-01-012003	Former section of US 61
Iowa 957	3.33[24]	5.36	US 63 near Bloomfield	US 63 near Bloomfield	01976-01-011976	01977-01-011977	Former section of US 63
Iowa 957	0.8	1.3	—	—	01979-01-011979	01980-01-011980	Legal description says "West of Iowa 2", but location is unknown.
Iowa 957	0.062	0.100	—	—	01988-01-011988	02003-01-012003	Former section of Iowa 22
Iowa 958	1.610	2.591	Ottumwa city limits	US 63 south of Ottumwa	01965-01-011965	02003-01-012003	Former section of US 63
Iowa 959	1.27[7]	2.04	US 65 / US 69 in Des Moines	Des Moines city limits	01970-01-011970	01981-01-011981	Former section of US 65/US 69 concurrency
Iowa 959	1.29[37]	2.08	US 61 / US 151 in Dubuque	US 61 / US 151 & US 52 in Dubuque	01992-01-011992	01993-01-011993	Former section of US 61/US 151 concurrency
Iowa 960	1.58[7]	2.54	Clarinda city limits	Iowa 2 near Clarinda	01973-01-011973	01982-01-011982	Former section of Iowa 2
Iowa 960	1.11[12]	1.79	—	—	01982-01-011982	01986-01-011986	Former section of US 61
Iowa 960	4.7	7.6	—	—	01993-01-011993	01994-01-011994	Former section of US 61/US 218 concurrency north of Keokuk
Iowa 960	1.016	1.635	US 75 Business/Iowa 404 in Le Mars	Dead end in Le Mars	02006-01-012006	02007-01-012007	Former section of Iowa 60
Iowa 961	0.56[7]	0.90	Villisca city limits	US 71 near Villisca	01976-01-011976	01980-01-011980	Former section of US 71
Iowa 961	1.08[37]	1.74	US 61 / US 151 in Dubuque	US 20 in Dubuque (southbound), Iowa 946 in Dubuque (northbound)	01991-01-011991	01993-01-011993	Former section of US 151 and US 61
Iowa 961	0.50[36]	0.80	—	—	01994-01-011994	01996-01-011996	Former section of US 61 in Wever
Iowa 961	3.613	5.815	Iowa 2 in Fort Madison	US 61 at Fort Madison	02011-01-012011	02013-01-012013	Section of US 61 Business in Fort Madison
Iowa 962	0.11[9]	0.18	US 218 near Ainsworth	County Road W64 near Ainsworth	01994-01-011994	01997-01-011997	Former section of US 218
Iowa 963	4.139	6.661	US 151 near Key West	US 61 / US 151 in Dubuque	01971-01-011971	02003-01-012003	Former section of US 151 and US 61
Iowa 964	4.704[9]	7.570	Iowa 92 near Knoxville	Iowa 92 near Knoxville	01977-01-011977	01996-01-011996	Former section of Iowa 92
Iowa 965	3.29[7]	5.29	—	—	01976-01-011976	01980-01-011980	Former section of US 52
Iowa 965	0.519	0.835	US 6 in Coralville	I-80 in Coralville	01985-01-011985	current	Former section of US 218; extended to Cedar Rapids until 2003
Iowa 966	4.89	7.87	Centralia	US 20	01976-01-011976	01996-01-011996	Former Iowa 416, and before that, was a section of US 20
Iowa 967	0.037	0.060	US 20 near Farley	Farley city limits	01976-01-011976	02003-01-012003	Former Iowa 418, and before that, was a section of US 20
Iowa 968	2.37[17]	3.81	Iowa 136 in Dyersville	US 20	01976-01-011976	01989-01-011989	Former Iowa 420, and before that, was a section of US 20
Iowa 968	5.36[36]	8.63	Iowa 163 in Pella	Iowa 163 in Pella	01993-01-011993	01994-01-011994	Former section of Iowa 163
Iowa 969	0.52[7]	0.84	US 169 near Burt	Burt	01976-01-011976	01980-01-011980	Spur route; former Iowa 422
Iowa 969	4.0	6.4	US 218 near Janesville	US 218 near Janesville	01993-01-011993	01994-01-011994	Former section of US 218
Iowa 970	31.79[7]	51.16	Business US 75 in Sioux City	Iowa 175 in Onawa	01976-01-011976	02003-01-012003	Former section of US 75
Iowa 971	10.78[7]	17.35	Iowa 2	US 59 in Shenandoah	01975-01-011975	01979-01-011979	Former section of Iowa 2
Iowa 971	1.802[25]	2.900	US 69 in Lake Mills	Winnebago–Worth county line	01993-01-011993	02003-01-012003	Former section of Iowa 105; only 0.777 miles in Lake Mills were left in 2002
Iowa 972	2.00	3.22	US 218	Mount Pleasant city limits	01969-01-011969	01974-01-011974	Former section of US 218; renumbered Iowa 976 to avoid confusion with the other Iowa 972
Iowa 972	2.772	4.461	I-29 / US 34 near Glenwood	Iowa 385 near Pacific Junction	01974-01-011974	01974-01-011974	Former section of US 34; renumbered Iowa 978 to avoid confusion with the other Iowa 972
Iowa 972	10.17[7]	16.37	Iowa 92 / US 169 in Winterset	US 169	01974-01-011974	01980-01-011980	Former section of US 169
Iowa 972	1.877	3.021	Northwood city limits	Northwood city limits	01993-01-011993	02003-01-012003	Former section of Iowa 105
Iowa 973	1.95[13]	3.14	I-29 in Council Bluffs	US 6 in Council Bluffs	01969-01-011969	01971-01-011971	Former section of US 75
Iowa 973	10.32[22]	16.61	US 71 near Atlantic	Iowa 148 in Anita	01972-01-011972	01973-01-011973	Former section of US 6; became part of an extended Iowa 83
Iowa 973	1.49[7]	2.40	Iowa 92 in Winterset	Iowa 972 in Winterset	01976-01-011976	01980-01-011980	Former section of Iowa 92
Iowa 974	5.09[7]	8.19	O'Connor Road northwest of Mount Vernon	Mount Vernon city limits	01965-01-011965	01980-01-011980	Former section of Iowa 150
Iowa 975	1.33[18]	2.14	North city limits of Marengo	CR F15 north of Marengo	01964-01-011964	01974-01-011974	Former section of Iowa 411
Iowa 975	1.55[12]	2.49	Iowa 964 in Knoxville	Iowa 5 / Iowa 92 in Knoxville	01978-01-011978	01986-01-011986	Former section of Iowa 5/Iowa 92 concurrency
Iowa 975	0.13	0.21	—	—	01995-01-011995	01995-01-011995	Former section of US 275/Iowa 333 concurrency east of Hamburg
Iowa 976	2.00[18]	3.22	US 218	Mount Pleasant city limits	01974-01-011974	01980-01-011980	Former section of US 218; formerly Iowa 972
Iowa 976	0.22	0.35	Marshalltown city limits	Governor Road east of Marshalltown	01996-01-011996	01997-01-011997	Former section of US 30
Iowa 976	0.879	1.415	—	—	01997-01-011997	02003-01-012003	Former section of US 30
Iowa 977	2.007	3.230	US 59 in Cherokee	Iowa 3 near Cherokee	01962-01-011962	02003-01-012003	Former section of Iowa 3
Iowa 978	2.77[19]	4.46	Iowa 44 in Whittemore	Iowa 358 in Whittemore	01962-01-011962	01965-01-011965	Former section of Iowa 358
Iowa 978	2.772	4.461	I-29 / US 34 near Glenwood	Iowa 385 near Pacific Junction	01974-01-011974	02003-02-182003	Former section of US 34; formerly Iowa 972
Iowa 979	19.80[13]	31.87	Iowa City limits	Iowa 38	01961-01-011961	02003-01-012003	Former section of Iowa 1
Iowa 980	0.77[7]	1.24	US 34 near Ottumwa	Ottumwa city limits	01967-01-011967	01980-01-011980	Former section of US 34; formerly US 34 Alternate
Iowa 981	0.44[7]	0.71	Iowa 150 near Fayette	Fayette city limits	01967-01-011967	01980-01-011980	Former section of Iowa 150; formerly Iowa 991
Iowa 981	0.2	0.3	US 34 (later Iowa 340) in Batavia	US 34 (later Iowa 340) in Batavia	01995-01-011995	01996-01-011996	Former section of US 34
Iowa 982	0.30[19]	0.48	Dubuque–Jones County Line	Iowa 136 near Cascade	01961-01-011961	01965-01-011965	Former section of Iowa 136
Iowa 982	27.787	44.719	Smithland city limits	Sioux City city limits	01967-01-011967	02003-01-012003	Former section of Iowa 141; formerly Iowa 994
Iowa 983	0.99[19]	1.59	Iowa 989	US 34 / Iowa 213	01961-01-011961	01964-01-011964	Former section of Iowa 213
Iowa 983	0.81[7]	1.30	US 34 west of Chariton	US 34 east of Chariton	01967-01-011967	01980-01-011980	Former section of US 34; formerly Iowa 995 and Iowa 996; had a gap through Chariton
Iowa 983	0.2	0.3	Market Street in Carlisle	Dead end in Carlisle	01998-01-011998	01998-01-011998	Former section of Iowa 5
Iowa 984	2.24[15]	3.60	Bettendorf city limits	US 67 in Le Claire	01968-01-011968	01982-01-011982	Former section of Iowa 417
Iowa 985	1.00[19]	1.61	US 63 north of Oskaloosa	US 63 north of Oskaloosa	01961-01-011961	01965-01-011965	Former section of US 63; decommissioned by 1965
Iowa 985	7.66[22]	12.33	Sioux City limits	I-29 in Sioux City	01969-01-011969	01973-01-011973	Former section of Iowa 7
Iowa 985	1.927	3.101	US 52 near Bellevue State Park	US 52 near Bellevue	01980-01-011980	02003-01-012003	Park access road; former section of US 52
Iowa 986	4.86[12]	7.82	Harrison–Monona county line	Iowa 301 in River Sioux	01968-01-011968	01986-01-011986	Former section of US 75
Iowa 987	4.45[19]	7.16	US 63 / Iowa 412 in Waterloo	Hudson city limits	01961-01-011961	01964-01-011964	Former section of US 63
Iowa 988	0.16[19]	0.26	Iowa 58 near Hudson	Hudson city limits	01961-01-011961	01964-01-011964	Former section of US 63
Iowa 988	2.312	3.721	I-29 / I-680 near Crescent	Iowa 183 in Crescent	01975-01-011975	02003-01-012003
Iowa 989	17.76[19]	28.58	Albia city limits	US 34 near Ottumwa	01961-01-011961	01964-01-011964	Former section of US 34
Iowa 990	0.27[19]	0.43	Iowa 150 near Fayette	Fayette city limits	01961-01-011961	01965-01-011965	Former section of Iowa 150
Iowa 991	0.44[5]	0.71	Fayette city limits	Iowa 150 near Fayette	01961-01-011961	01967-01-011967	Former section of Iowa 150; renumbered Iowa 981
Iowa 992	8.81[19]	14.18	Wesley city limits	Britt city limits	01961-01-011961	01965-01-011965	Former section of US 18
Iowa 993	3.52[19]	5.66	US 18 near Wesley	Wesley city limits	01961-01-011961	01965-01-011965	Former section of US 18
Iowa 994	27.787[5]	44.719	Smithland city limits	Sioux City city limits	01961-01-011961	01967-01-011967	Former section of Iowa 141; renumbered Iowa 982
Iowa 995	0.56[5]	0.90	US 34 west of Chariton	Chariton city limits	01961-01-011961	01967-01-011967	Former section of US 34; renumbered Iowa 983
Iowa 996	0.23[18]	0.37	Chariton city limits	US 34 east of Chariton	01961-01-011961	01976-01-011976	Former section of US 34; became a second section of Iowa 983
Iowa 997	0.89[11]	1.43	US 169 / Iowa 5 near Fort Dodge	Fort Dodge city limits	01961-01-011961	01970-01-011970	Former section of Iowa 5 (now Iowa 7)
Iowa 998	0.67[37]	1.08	US 61 near Montrose	Dead end in Montrose	01961-01-011961	01994-01-011994	Former section of US 61; renumbered Iowa 924
Iowa 999	2.22[7]	3.57	Spruce Street in College Springs	Iowa 333 near College Springs	01961-01-011961	01980-01-011980	Former section of Iowa 333
Former

Highway markers from different years
Highway names
Interstates	Interstate nn (I-nn)
US Highways	U.S. Highway nn (US nn)
State	Iowa nn
System links
Iowa Primary Highway System Interstate U.S. State Secondary Scenic

References

1. 2012 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 2012. Retrieved November 6, 2013.
2. 2002 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 2002. Retrieved September 3, 2019.
3. "U.S. Road Markers Soon to Replace Familiar Primary Road Signs on U.S. System in Iowa". Service Bulletin Oct–Nov–Dec 1925. Iowa State Highway Commission. XIII (10–11–12): 3. 1925.
4. 1938 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. September 26, 1938. Retrieved September 13, 2019.
5. 1965 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. June 1966. Retrieved September 13, 2019.
6. 1956 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. May 1957. Retrieved September 14, 2019.
7. 1978 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. December 31, 1978. Retrieved September 13, 2019.
8. 1941 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. April 30, 1942. Retrieved September 14, 2019.
9. 1996 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. August 1997. Retrieved September 3, 2019.
10. 1934 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. March 25, 1935. Retrieved September 13, 2019.
11. 1968 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. March 1970. Retrieved September 13, 2019.
12. 1984 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. August 1985. Retrieved September 3, 2019.
13. 1970 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. July 1971. Retrieved September 13, 2019.
14. 1982 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. December 31, 1982. Retrieved September 3, 2019.
15. 1980 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. December 31, 1980. Retrieved September 13, 2019.
16. 1959 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. June 1960. Retrieved September 14, 2019.
17. 1988 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 1988. Retrieved September 3, 2019.
18. 1974 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. May 1, 1976. Retrieved September 13, 2019.
19. 1962 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. May 1963. Retrieved September 13, 2019.
20. 1986 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. 1987. Retrieved September 3, 2019.
21. 1953 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. August 1954. Retrieved September 14, 2019.
22. 1972 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. April 1973. Retrieved September 13, 2019.
23. 1951 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. January 1, 1951. Retrieved September 14, 2019.
24. 1976 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. December 31, 1976. Retrieved September 12, 2019.
25. 2000 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. August 2001. Retrieved September 3, 2019.
26. 1990 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. 1991. Retrieved September 3, 2019.
27. 2006 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 2006. Retrieved September 3, 2019.
28. 2003 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 2003. Retrieved September 3, 2019.
29. 1998 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. 1999. Retrieved September 3, 2019.
30. "Primary Route Descriptions – Unsigned Iowa 374 in Jasper County". Iowa Department of Transportation. Retrieved September 3, 2019.
31. 1949 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. January 1951. Retrieved September 14, 2019.
32. 2004 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 2004. Retrieved September 3, 2019.
33. 2008 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 2008. Retrieved September 3, 2019.
34. "Primary Route Descriptions – Iowa 475 in Monona County". Iowa Department of Transportation. Retrieved September 3, 2019.
35. https://iowadot.gov/analytics/PrimaryRteDescrips/Polk/IA%20915%20(unsigned).htm. Missing or empty |title= (help)
36. 1994 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. August 1995. Retrieved September 3, 2019.
37. 1992 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. 1993. Retrieved September 7, 2019.