Ohio State Route 503

State Route 503
Route information
	Maintained by ODOT
Length	40.53 mi[1] (65.23 km)
Existed	1937[2][3]–present
Major junctions
South end	US 127 in Seven Mile
	US 35 in West Alexandria; I-70 in Lewisburg; US 40 in Lewisburg
North end	SR 121 in Wayne Lakes
Location
Counties	Butler, Preble, Darke
Highway system

State Route 503 (SR 503) is a north–south state highway in the southwestern quadrant of the U.S. state of Ohio. The southern terminus of SR 503 is at U.S. Route 127 (US 127) in Seven Mile. Its northern terminus is at a T-intersection with SR 121 on the eastern limits of the village of Wayne Lakes.

Route description

Entering Ithaca from the north

Along its way, SR 503 travels through northern Butler County, eastern Preble County and southern Darke County. There are no segments of SR 503 that are included as a part of the National Highway System, a network of highways identified as being most important for the economy, mobility and defense of the nation.[4]

History

The SR 503 designation was assigned in 1937. The highway was established along the routing that it maintains to this day between US 127 in Seven Mile and SR 121 in Wayne Lakes. No changes of major significance have taken place to the routing of the highway since its inception.[2][3]

Major intersections

County	Location	mi[1]	km	Destinations	Notes
Butler	Seven Mile	0.00	0.00	US 127 (Main Street) / Mill Road – Hamilton
	Wayne Township	0.97	1.56	SR 73 (Trenton Oxford Road) – Trenton, Oxford
	Wayne Township	4.61	7.42	SR 744 (Somerville Jacksonburg Road) – Somerville, Jacksonburg
Preble	Gratis	12.19	19.62	SR 725 (South Street)
	Gratis	12.26	19.73	SR 122 (Franklin Street)
	West Alexandria	19.16	30.84	US 35 (Dayton Street)
	Harrison Township	25.60	41.20	I-70 – Columbus, Indianapolis	Exit 14 (I-70)
	Lewisburg	26.83	43.18	US 40 (Cumberland Street)
Darke	Ithaca	32.71	52.64	SR 722 east (Cross Street)	Southern end of SR 722 concurrency
	Twin Township	32.85	52.87	SR 722 west	Northern end of SR 722 concurrency
	Butler Township	38.94	62.67	US 127 – Castine, Greenville
	Wayne Lakes	40.53	65.23	SR 121 – New Madison, Fort Jefferson, Greenville
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus

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References

Ohio Department of Transportation. "Technical Services Straight Line Diagrams". Retrieved 2011-02-26.
Official Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1936. Retrieved 2011-02-25.
Official Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1937. Retrieved 2011-02-25.
National Highway System: Ohio (PDF) (Map). Federal Highway Administration. December 2003. Retrieved 2011-02-25.

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[sld-1] Ohio Department of Transportation. "Technical Services Straight Line Diagrams". Retrieved 2011-02-26.

[ODOT1936_map-2] Official Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1936. Retrieved 2011-02-25.

[ODOT1937_map-3] Official Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1937. Retrieved 2011-02-25.

[NHS-4] National Highway System: Ohio (PDF) (Map). Federal Highway Administration. December 2003. Retrieved 2011-02-25.