Pima County, Arizona

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Pima County, Arizona
Pima County Courthouse.jpg
Pima County Courthouse in Tucson
Seal of Pima County, Arizona
Map of Arizona highlighting Pima County
Location in the state of Arizona
Map of the United States highlighting Arizona
Arizona's location in the U.S.
Founded November 9, 1864
Named for Pima people
Seat Tucson
Largest city Tucson
 • Total 9,189 sq mi (23,799 km2)
 • Land 9,187 sq mi (23,794 km2)
 • Water 2.1 sq mi (5 km2), 0.02%
 • (2010) 980,263
 • Density 107/sq mi (41/km²)
Congressional districts 1st, 2nd, 3rd
Time zone Mountain: UTC-7
Website www.pima.gov
Pima County Fair, 2007

Pima County /ˈpmə/ is a county in the south central region of the U.S. state of Arizona. As of the 2010 census, the population was 980,263,[1] making it the second-most populous county in Arizona. The county seat is Tucson,[2] where nearly all of the population is centered. The county is named after the Pima Native Americans who are indigenous to this area.

Pima County comprises the Tucson, AZ Metropolitan Statistical Area.

Pima County contains parts of the Tohono O'odham Nation, as well as all of the San Xavier Indian Reservation, the Pascua Yaqui Indian Reservation, Organ Pipe Cactus National Monument, Ironwood Forest National Monument and Saguaro National Park.

The vast majority of the county population lies in and around the city of Tucson (2011 city population: 525,796), filling much of the eastern part of the county with urban development. Tucson, Arizona's second largest city, is a major commercial and academic center. Other urban areas include the Tucson suburbs of Oro Valley (population 41,335), Marana (population 35,232), Sahuarita (population 25,458), and South Tucson (population 5,695), a large ring of unincorporated urban development, and the growing satellite town Green Valley. The rest of the county is sparsely populated; the largest towns are Sells, the capital of the Tohono O'odham Nation, and Ajo in the far western region of the county.


Pima County, one of the four original counties in Arizona, was created by the 1st Arizona Territorial Legislature with land acquired through the Gadsden Purchase from Mexico in 1853. The original county consisted of all of Arizona Territory east of longitude 113° 20' and south of the Gila River.[3] Soon thereafter, the counties of Cochise, Graham and Santa Cruz were carved from the original Pima County.[4]


According to the U.S. Census Bureau, the county has a total area of 9,189 square miles (23,800 km2), of which 9,187 square miles (23,790 km2) is land and 2.1 square miles (5.4 km2) (0.02%) is water.[5]

Topographic features[edit]

Major highways[edit]

Adjacent counties and municipios[edit]

National protected areas[edit]

Metropolitan Statistical Area[edit]

The United States Office of Management and Budget has designated Pima County as the Tucson, AZ Metropolitan Statistical Area.[6] The United States Census Bureau ranked the Tucson, AZ Metropolitan Statistical Area as the 53rd most populous metropolitan statistical area of the United States as of July 1, 2012.[7]

The Office of Management and Budget has further designated the Tucson, AZ Metropolitan Statistical Area as a component of the more extensive Tucson-Nogales, AZ Combined Statistical Area,[6] the 53rd most populous combined statistical area and the 59th most populous primary statistical area of the United States as of July 1, 2012.[7][8]


Pima County is governed by a 5 member Board of Supervisors that set ordinances and run services for the areas that do not fall within any city or town jurisdiction.

Board of Supervisors[edit]

Party District Name First elected Area(s) represented
  Republican District 1 Ally Miller 2012 Oro Valley, Marana
  Democrat District 2 Ramon Valadez Appointed 2003 Tucson, Sahuarita, South Tucson
  Democrat District 3 Sharon Bronson 1996 Tucson, Marana, Three Points, Sahuarita
  Republican District 4 Ray Carroll Appointed 1997 Tucson, Vail, Summerhaven, Green Valley
  Democratic District 5 Richard Elias Appointed 2002 Tucson, Sahuarita, Green Valley



Historical population
Census Pop.
1870 5,716
1880 17,006 197.5%
1890 12,673 −25.5%
1900 14,689 15.9%
1910 22,818 55.3%
1920 34,680 52.0%
1930 55,676 60.5%
1940 72,838 30.8%
1950 141,216 93.9%
1960 265,660 88.1%
1970 351,667 32.4%
1980 531,443 51.1%
1990 666,880 25.5%
2000 843,746 26.5%
2010 980,263 16.2%
Est. 2013 996,554 1.7%
U.S. Decennial Census[10]
1790-1960[11] 1900-1990[12]
1990-2000[13] 2010-2013[1]


Whereas according to the 2010 U.S. Census Bureau:


As of the 2000 census, there were 843,746 people, 332,350 households, and 212,039 families residing in the county. The population density was 92 people per square mile (35/km²). There were 366,737 housing units at an average density of 40 per square mile (15/km²). The racial makeup of the county was 75.07% White, 3.03% Black or African American, 3.22% Native American, 2.04% Asian, 0.13% Pacific Islander, 13.30% from other races, and 3.21% from two or more races. 29.34% of the population were Hispanic or Latino of any race. 22.80% reported speaking Spanish at home [1].

There were 332,350 households out of which 29.20% had children under the age of 18 living with them, 47.70% were married couples living together, 11.80% had a female householder with no husband present, and 36.20% were non-families. 28.50% of all households were made up of individuals and 9.40% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 3.06.

In the county the population was spread out with 24.60% under the age of 18, 10.90% from 18 to 24, 28.40% from 25 to 44, 21.90% from 45 to 64, and 14.20% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 95.70 males. For every 100 females age 18 and over, there were 92.70 males.

The median income for a household in the county was $36,758, and the median income for a family was $44,446. Males had a median income of $32,156 versus $24,959 for females. The per capita income for the county was $19,785. About 10.50% of families and 14.70% of the population were below the poverty line, including 19.40% of those under age 18 and 8.20% of those age 65 or over.


Map of the incorporated and unincorporated cities and towns in Pima County. Also shown are the borders for the Indian Reservations in the County.
Astronaut photo of the open-pit copper mines adjacent to Green Valley, 2010. Note that north is to the left.



Other communities[edit]

Indian reservations[edit]

Census-designated places[edit]

See also[edit]

Tourist attractions[edit]


  1. ^ a b "State & County QuickFacts". United States Census Bureau. Retrieved May 18, 2014. 
  2. ^ "Find a County". National Association of Counties. Retrieved 2011-06-07. 
  3. ^ Wagoner, Jay J. (1970). Arizona Territory 1863–1912: A Political history. Tucson: University of Arizona Press. p. 58. ISBN 0-8165-0176-9. 
  4. ^ "History: Pima County". Pima County Justice Court (jp.pima.gov). September 27, 2000. Retrieved 2009-09-30. 
  5. ^ "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23. 
  6. ^ a b "OMB Bulletin No. 13-01: Revised Delineations of Metropolitan Statistical Areas, Micropolitan Statistical Areas, and Combined Statistical Areas, and Guidance on Uses of the Delineations of These Areas". United States Office of Management and Budget. February 28, 2013. Retrieved March 20, 2013. 
  7. ^ a b "Table 1. Annual Estimates of the Population of Metropolitan and Micropolitan Statistical Areas: April 1, 2010 to July 1, 2012" (CSV). 2012 Population Estimates. United States Census Bureau, Population Division. March 2013. Retrieved March 20, 2013. 
  8. ^ "Table 2. Annual Estimates of the Population of Combined Statistical Areas: April 1, 2010 to July 1, 2012" (CSV). 2012 Population Estimates. United States Census Bureau, Population Division. March 2013. Retrieved March 20, 2013. 
  9. ^ http://www.pima.gov/bos/
  10. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved May 18, 2014. 
  11. ^ "Historical Census Browser". University of Virginia Library. Retrieved May 18, 2014. 
  12. ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved May 18, 2014. 
  13. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000". United States Census Bureau. Retrieved May 18, 2014. 

External links[edit]

Coordinates: 32°03′55″N 111°49′15″W / 32.06528°N 111.82083°W / 32.06528; -111.82083