Ada County, Idaho

Ada County is a county in the southwestern part of the U.S. state of Idaho. As of the 2010 United States Census, the county had a population of 392,365,[1] making it the state's most populous county, with 23.3% of the state's 2010 population. The county seat and largest city is Boise,[2] which is also the state capital.[3]

Ada County
U.S. county
James A. McClure Federal Building and U.S. Courthouse in Boise, Idaho.
Seal
Location within the U.S. state of Idaho
Idaho's location within the U.S.
Coordinates: 43°27′N 116°14′W
Country United States
State Idaho
FoundedDecember 22, 1864
Named forAda Riggs
SeatBoise
Largest cityBoise
Area
 • Total1,060 sq mi (2,700 km2)
 • Land1,053 sq mi (2,730 km2)
 • Water7.9 sq mi (20 km2)  0.7%
Population
 (2010)
 • Total392,365
 • Estimate 
(2019)
481,587
 • Density370/sq mi (140/km2)
Time zoneUTC−7 (Mountain)
 • Summer (DST)UTC−6 (MDT)
Congressional districts1st, 2nd
Websitewww.adaweb.net
County Code: 1A

Ada County is included in the Boise, ID Metropolitan Statistical Area.

Ada County is by far the state's largest in population, containing just under one quarter of the state's residents, and contains its only county highway district. The Ada County Highway District (ACHD) has jurisdiction over all the local county and city streets, except for private roads and state roads. In the interior Northwest east of the Cascade Range, Ada County ranks second in population behind only Spokane County, Washington.

History

Ada County was created by the Idaho Territorial Legislature on December 22, 1864, partitioned from Boise County. It is named for Ada Riggs, the daughter of H.C. Riggs, a member of the legislature; he established the county and was a co-founder of Boise.[4] Canyon County, which originally included Payette County and most of Gem County, was partitioned from western Ada County in 1891.

Geography

According to the US Census Bureau, the county has a total area of 1,060 square miles (2,700 km2), of which 1,053 square miles (2,730 km2) is land and 7.9 square miles (20 km2) (0.7%) is water.[5] The Boise River flows through the northern portion of the county, and the northwest border is bounded by the foothills of the Boise Range mountains, the summits are in adjacent Boise County. The southwestern border of the county is bounded by the Snake River.

Adjacent counties

Major highways

County roads and highways are maintained by the Ada County Highway District (ACHD).

National protected areas

Demographics
Historical population
CensusPop.%±
18702,675—
18804,67474.7%
18908,36879.0%
190011,55938.1%
191029,088151.6%
192035,21321.1%
193037,9257.7%
194050,40132.9%
195070,64940.2%
196093,46032.3%
1970112,23020.1%
1980173,03654.2%
1990205,77518.9%
2000300,90446.2%
2010392,36530.4%
Est. 2019481,587[6]22.7%
US Decennial Census[7]
1790-1960[8] 1900-1990[9]
1990-2000[10] 2010-2019[1]

2000 census

As of the 2000 United States Census,[11] there were 300,904 people, 113,408 households, and 77,344 families in the county. The population density was 285/mi² (110/km²). There were 118,516 housing units at an average density of 112/mi² (43/km²). The racial makeup of the county was 92.86% White, 0.65% Black or African American, 0.69% Native American, 1.74% Asian, 0.15% Pacific Islander, 1.67% from other races, and 2.24% from two or more races. Hispanic or Latino of any race were 4.48% of the population.

There were 113,408 households out of which 36.20% had children under the age of 18 living with them, 55.10% were married couples living together, 9.40% had a female householder with no husband present, and 31.80% were non-families. 23.80% of all households were made up of individuals and 6.07% had someone living alone who was 65 years of age or older. The average household size was 2.59 and the average family size was 3.11.

The county population contained 27.30% under the age of 18, 10.30% from 18 to 24, 32.50% from 25 to 44, 20.80% from 45 to 64, and 9.10% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 100.6 males. For every 100 females age 18 and over, there were 98.9 males.

The median income for a household in the county was $46,140, and the median income for a family was $54,416. Males had a median income of $37,867 versus $26,453 for females. The per capita income for the county was $22,519. About 5.40% of families and 7.70% of the population were below the poverty line, including 9.20% of those under age 18 and 5.70% of those age 65 or over.

2010 census

As of the 2010 United States Census, there were 392,365 people, 148,445 households, and 99,282 families in the county.[12] The population density was 372.8 inhabitants per square mile (143.9/km2). There were 159,471 housing units at an average density of 151.5 per square mile (58.5/km2).[13] The racial makeup of the county was 90.3% white, 2.4% Asian, 1.1% black or African American, 0.7% American Indian, 0.2% Pacific islander, 2.4% from other races, and 2.8% from two or more races. Those of Hispanic or Latino origin made up 7.1% of the population.[12] In terms of ancestry, 19.4% were German, 15.9% were English, 11.8% were Irish, and 8.6% were American.[14]

Of the 148,445 households, 35.6% had children under the age of 18 living with them, 52.4% were married couples living together, 10.0% had a female householder with no husband present, 33.1% were non-families, and 25.0% of all households were made up of individuals. The average household size was 2.58 and the average family size was 3.11. The median age was 34.8 years.[12]

The median income for a household in the county was $55,835 and the median income for a family was $67,519. Males had a median income of $48,290 versus $34,875 for females. The per capita income for the county was $27,915. About 6.9% of families and 10.2% of the population were below the poverty line, including 11.8% of those under age 18 and 6.8% of those age 65 or over.[15]

2016

In terms of ancestry, 18.2% were English, 17.6% were German, 9.7% were Irish, 5.7% were American, 3.6% were Norwegian, 3.4% were Italian, 3.4% were Scottish, 2.8% were Swedish, 2.4% were French, 2.0% were Dutch, 1.7% were Polish, 1.6% were Danish and 1.3% were Welsh.[16]

Government and politics

Ada County has traditionally been a Republican Party stronghold. The last victory in a presidential election by a Democrat in Ada County was by Franklin D. Roosevelt in 1936 - the last time a Democrat carried the state of Idaho was Lyndon B. Johnson in 1964.[17] In 2008 the presidential election in Ada County was more competitive than in previous years; John McCain defeated Barack Obama by six percentage points.[18]

Democratic gubernatorial nominee Jerry Brady carried the county in his 2002 and 2006 races, despite losing statewide in both contests.[19][20] Another prominent Democrat, Boise mayor David H. Bieter, was elected in 2007, 2011 and 2015.[21][22]

In the Idaho Legislature, Ada County is split between nine districts, the most of any county.[23] In the state house, Republicans hold ten seats and Democrats hold eight. In the state senate, Republicans hold five seats and Democrats hold four. Generally, Democratic strength is concentrated in Boise itself, while Republican strength is concentrated in the western suburbs.[24] Several of the Boise seats were Democratic pickups in 2006.[25]

Each party held all of their respective legislative seats the 2008 elections, but Republicans won two competitive county commission races.[26]

Ada County Registered Voters by Political Party (as of April 6, 2020)[27]
Political Party Constitution Democratic Libertarian Republican Unaffiliated Total Registered Voters
Number of Registered Voters 672 53,429 3,057 106,683 102,926 266,769
Presidential election results
Previous presidential election results[28]
Year Republican Democratic Third parties
2016 47.9% 93,752 38.7% 75,677 13.4% 26,240
2012 53.5% 97,554 42.3% 77,137 4.2% 7,555
2008 51.6% 93,328 45.5% 82,236 2.9% 5,196
2004 61.1% 94,641 37.8% 58,523 1.2% 1,866
2000 60.8% 75,050 32.9% 40,650 6.3% 7,785
1996 52.5% 61,811 36.6% 43,040 11.0% 12,892
1992 44.5% 49,000 29.0% 31,941 26.5% 29,225
1988 62.9% 54,951 35.0% 30,525 2.1% 1,858
1984 72.4% 60,036 26.2% 21,760 1.4% 1,128
1980 63.8% 55,205 24.6% 21,324 11.6% 10,015
1976 64.4% 41,135 33.1% 21,125 2.6% 1,629
1972 67.5% 36,665 23.4% 12,687 9.1% 4,959
1968 63.0% 30,185 24.1% 11,529 12.9% 6,167
1964 56.4% 25,404 43.6% 19,639
1960 62.0% 27,703 38.1% 17,017
1956 70.0% 26,387 30.0% 11,328
1952 72.7% 27,415 27.2% 10,281 0.1% 40
1948 56.1% 14,972 42.1% 11,253 1.8% 480
1944 55.5% 13,410 44.2% 10,667 0.3% 67
1940 50.9% 12,861 49.0% 12,381 0.2% 51
1936 36.9% 7,581 58.5% 12,027 4.7% 966
1932 46.0% 8,055 50.4% 8,836 3.6% 631
1928 71.8% 10,279 27.4% 3,921 0.8% 108
1924 54.5% 7,220 28.5% 3,780 17.0% 2,255
1920 66.7% 8,419 33.1% 4,173 0.2% 27
1916 48.3% 5,299 47.5% 5,207 4.2% 460
1912 32.0% 3,198 25.7% 2,569 42.3% 4,227
1908 53.1% 4,778 41.3% 3,721 5.6% 503
1904 69.5% 4,536 22.5% 1,466 8.0% 524
1900 56.6% 2,706 43.4% 2,072

County Offices

The county government is administered by the Ada County Board of Commissioners, a three-member legislative body. Other elected officials include clerk, treasurer, sheriff, assessor, coroner, and prosecutor.[29]

County Elected Offices
Office Office Holder Party
  Assessor [30] Robert H. McQuade Republican
  Clerk of the Circuit Court [31] Phil McGrane Republican
  County Commissioner District 1 [32] Diana Lachiondo Democrat
  County Commissioner District 2 [33] Rick Visser Republican
  County Commissioner District 3 [34] Kendra Kenyon (Chair of the Board) Democrat
  Coroner [35] Dotti Owens Democrat
  Prosecutor [36] Jan M. Bennetts Republican
  Sheriff [37] Steve Bartlett Republican
  Treasurer [38] Elizabeth Mahn Republican

The Idaho Department of Correction operates the South Boise Prison Complex,[39] a correctional facility located in unincorporated Ada County, south of the Boise Airport and east of Kuna.[40]

Education

Public school districts

Communities

Cities

Census-designated place

Unincorporated communities
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See also

References
  1. "State & County QuickFacts". US Census Bureau. Archived from the original on July 3, 2011. Retrieved June 28, 2014.
  2. "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
  3. "Facts About Idaho". Idaho Department of Commerce. 2011. Archived from the original on September 3, 2011. Retrieved 10 November 2011.
  4. "Ada County". Retrieved August 28, 2017.
  5. "US Gazetteer files: 2010, 2000, and 1990". US Census Bureau. February 12, 2011. Retrieved April 23, 2011.
  6. "Population and Housing Unit Estimates". Retrieved March 26, 2020.
  7. "US Decennial Census". US Census Bureau. Retrieved June 28, 2014.
  8. "Historical Census Browser". University of Virginia Library. Retrieved June 28, 2014.
  9. "Population of Counties by Decennial Census: 1900 to 1990". US Census Bureau. Retrieved June 28, 2014.
  10. "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). US Census Bureau. Retrieved June 28, 2014.
  11. "U.S. Census website". US Census Bureau. Retrieved January 31, 2008.
  12. "Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". US Census Bureau. Archived from the original on 13 February 2020. Retrieved 30 December 2015.
  13. "Population, Housing Units, Area, and Density: 2010 - County". US Census Bureau. Archived from the original on 13 February 2020. Retrieved 30 December 2015.
  14. "Selected Social Characteristics in the US – 2006-2010 American Community Survey 5-Year Estimates". US Census Bureau. Archived from the original on February 13, 2020. Retrieved December 30, 2015.
  15. "Selected Economic Characteristics – 2006-2010 American Community Survey 5-Year Estimates". US Census Bureau. Archived from the original on February 13, 2020. Retrieved December 30, 2015.
  16. "Fact Finder 2016". Archived from the original on 2020-02-13. Retrieved 2018-03-02.
  17. "1964 Presidential General Election Results - Idaho". Retrieved 2 January 2018.
  18. 2008 - General Election Ada County Archived March 21, 2015, at the Wayback Machine
  19. November 5, 2002 General Election Results Archived August 27, 2008, at the Wayback Machine
  20. November 7, 2006 General Election Results Archived August 27, 2008, at the Wayback Machine
  21. Bieter beats Tibbs in Boise mayor race Archived 14 July 2011 at the Wayback Machine
  22. "Archived copy". Archived from the original on March 4, 2016. Retrieved 7 January 2016.CS1 maint: archived copy as title (link)
  23. Idaho Legislative District Map Archived 17 November 2011 at the Wayback Machine
  24. "Idaho Legislative Districts". Archived from the original on 10 November 2008. Retrieved 2 January 2018.
  25. "Baseline 08: Idaho Legislature". Ridenbaugh Press. Retrieved January 2, 2018.
  26. "Election shows GOP still has the edge in Ada County". Retrieved January 2, 2018.
  27. "Voter Registration Totals as of April 6, 2020". sos.idaho.gov. Retrieved 2020-06-05.
  28. Leip, David. "Atlas of US Presidential Elections". uselectionatlas.org. Retrieved January 2, 2018.
  29. "Ada County". Adaweb.net. Retrieved January 2, 2018.
  30. "Assessor". Adacounty.id.gov. Retrieved 2 January 2018.
  31. "Ada County Clerk Auditor Recorder > Home". Adacounty.id.gov. Retrieved 14 March 2019.
  32. "Diana Lachiondo, Dist. 1". Adacounty.id.gov. Retrieved 14 March 2019.
  33. "Rick Visser, Dist. 2". Adacounty.id.gov. Retrieved 2 January 2018.
  34. "Kendra Kenyon, Dist. 3". Adacounty.id.gov. Retrieved 14 March 2019.
  35. "Coroner". Adacounty.id.gov. Retrieved 2 January 2018.
  36. "Ada County Prosecutor". Adacounty.id.gov. Retrieved 2 January 2018.
  37. "Ada County Sheriff > Home". Adasheriff.org. Retrieved 2 January 2018.
  38. "Treasurer". Adacounty.id.gov. Retrieved 14 March 2019.
  39. Information Technology Projects. Idaho Department of Correction. March 2011. Retrieved on June 3, 2011.
  40. Locations. Idaho Department of Correction. Retrieved on June 4, 2011.
  41. Mora ID Google Maps (accessed 16 January 2019)
  42. Pleasant Valley ID Google Maps (accessed 16 January 2019)
  43. Sonna ID Google Maps (accessed 16 January 2019)

Further reading

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