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Pima County, Arizona
Pima County Courthouse
Pima County Courthouse in Tucson
Pima County, Arizona seal
Map of Arizona highlighting Pima County
Location in the state of Arizona
Map of USA AZ
Arizona's location in the U.S.
Founded November 9, 1864
Named for Pima people
Seat Tucson
Largest city Tucson
 - Total
 - Land
 - Water

9,189 sq mi (23,799 km²)
9,187 sq mi (23,794 km²)
2.1 sq mi (5 km²), 0.02%
 - (2010)
 - Density

107/sq mi (41/km²)
Congressional districts 1st, 2nd, 3rd
Time zone Mountain: UTC-7
Pima County Fair

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 featuresEdit

Major highwaysEdit

Adjacent counties and municipiosEdit

National protected areasEdit

Metropolitan Statistical AreaEdit

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 populations
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 18.1%
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: In 2014, though unofficially, Metro Tucson, and Pima County have passed 1,000,000 in population.


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.


Pima County Incorporated and Unincorporated areas

Map of the incorporated and unincorporated cities and towns in Pima County. Also shown are the borders for the Indian Reservations in the County.

Pima Co. Copper mines

Astronaut photo of the open-pit copper mines adjacent to Green Valley, 2010. Note that north is to the left.

Cities and Towns. Edit

Census-designated placesEdit

Indian reservationsEdit

Other communitiesEdit

County Population RankingEdit

The population ranking of the following table is based on the 2010 census of Pima County.[14][15]

county seat

Rank City/Town/etc. Population (2010 Census) Municipal type Incorporated
1 Tucson 520,116 City
2 Casas Adobes 66,795 CDP
3 Catalina Foothills 50,796 CDP
4 Oro Valley 41,011 Town 1974
5 Marana 34,961 Town 1977
6 Drexel Heights 27,749 CDP
7 Sahuarita 25,259 Town 1994
8 Green Valley 21,391 CDP
9 Tanque Verde 16,901 CDP
10 Flowing Wells 16,419 CDP
11 Tucson Estates 12,192 CDP
12 Vail 10,208 CDP
13 Picture Rocks 9,563 CDP
14 Valencia West 9,355 CDP
15 Catalina 7,569 CDP
16 Avra Valley 6,050 CDP
17 Corona de Tucson 5,675 CDP
18 South Tucson 5,652 City
19 Three Points 5,581 CDP
20 Summit 5,372 CDP
21 Rincon Valley 5,139 CDP
22 Ajo 3,304 CDP
23 Sells 2,495 CDP
24 Arivaca Junction 1,090 CDP
25 Littletown 873 CDP
26 Arivaca 695 CDP
27 Pimaco Two 682 CDP
28 Santa Rosa 628 CDP
29 Elephant Head 612 CDP
30 Pisinemo 321 CDP
31 Topawa 299 CDP
32 Nelson 259 CDP
33 San Miguel 197 CDP
34 Gu Oidak 188 CDP
35 Why 167 CDP
36 Ali Chuk 161 CDP
37 Maish Vaya 158 CDP
38 Anegam 151 CDP
39 Cowlic 135 CDP
40 Ali Chukson 132 CDP
41 Wahak Hotrontk 114 CDP
42 South Komelik 111 CDP
43 Rillito 97 CDP
44 Haivana Nakya 96 CDP
45 Chiawuli Tak 78 CDP
46 Ali Molina 71 CDP
47 Charco 52 CDP
48 Ventana 49 CDP
49 Ko Vaya 46 CDP
50 Summerhaven 40 CDP
51 Nolic 37 CDP
52 Ak Chin 30 CDP
53 Comobabi 8 CDP
54 Willow Canyon 1 CDP

See alsoEdit

Tourist attractionsEdit


  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. pp. 58. ISBN 0-8165-0176-9. 
  4. ^ "History: Pima County". Pima County Justice Court ( 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. ^
  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. 
  14. ^
  15. ^

External linksEdit

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

This page uses content from the English language Wikipedia. The original content was at Pima County, Arizona. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License.

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