Pima County is a county in the south central region of the U.S. state of Arizona. As of the 2020 census, the population was 1,043,433, making it Arizona's second-most populous county. The county seat is Tucson, where most of the population is centered. The county is named after the Pima Native Americans, also known as Tohono O'odham, who are indigenous to this area. Pima County includes the entirety of the Tucson Metropolitan Statistical Area, and it is the third largest metropolitan area in the Southwestern United States. 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, filling much of the eastern part of the county with urban development.

Founded: November 9, 1864
Named for: Pima people
Seat: Tucson
Largest city: Tucson
Total: 9,189 sq mi (23,799.4 km²)
Land: 9,187 sq mi (23,794.22 km²)
Water: 2.1 sq mi (5.44 km²), 0.02%
Time zone: Mountain: UTC-7
Website: [www.pima.gov]
Official Website: http://www.pima.gov
Wikidata description: county in Arizona, United States
Wikidata id: Q58688
Wikidata label: Pima County
Wikidata aliases: Array
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