Pima County Information

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 county is named after the Pima Native Americans who are indigenous to this area. 

The original county consisted of all of Arizona Territory east of longitude 113° 20' and south of the Gila River. Soon thereafter, the counties of Cochise, Graham and Santa Cruz were carved from the original Pima County. Although greatly reduced from its original size, Pima County still covers 9,184 square miles. It ranges in elevation from 1,200 feet to the 9,185-foot peak of Mount Lemmon.

It is Arizona's second-most populous county. The county seat is Tucson, where most of the population is centered.  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 county's far western region.  

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 San Xavier, Pascua Yaqul and Tohono O'odham reservations together account for ownership of 42.1 percent of land located in Pima County. The state of Arizona owns 14.9 percent; the U.S. Forest Service and Bureau of Land Management, 12.1 percent; other public lands, 17.1 percent: and individual or corporate ownership, 13.8 percent.

Cities
South Tucson * Tucson

Towns
Marana (Part in Pinal County) * Oro Valley * Sahuarita

Census-designated places
Ajo * Ak Chin * Ali Chuk * Ali Chukson * Ali Molina * Anegam * Arivaca * Arivaca Junction * Avra Valley * Casas Adobes * Catalina * Catalina Foothills * Chiawuli Tak * Charco * Comobabi * Corona de Tucson * Cowlic * Drexel Heights * Elephant Head * Flowing Wells * Green Valley * Gu Oidak * Haivana Nakya * J-Six Ranchettes * Kleindale * Ko Vaya * Littletown * Maish Vaya * Nelson * Nolic * Picture Rocks * Pimaco Two * Pisinemo * Rillito * Rincon Valley * San Miguel * Santa Rosa * Sells * South Komelik * Summerhaven * Summit * Tanque Verde * Three Points * Topawa * Tucson Estates * Tucson Mountains * Vail * Valencia West * Ventana * Wahak Hotrontk * Why * Willow Canyon

Indian communities
Pascua Yaqui * San Xavier * Tohono O'odham (part)

Other communities
Drexel-Alvernon * East Sahuarita * Kentucky Camp * Lukeville * Redington * Sasabe * Tortolita

Ghost towns
Achi * Ahan Owuch * Ak Chut Vaya * Allen * Cerro Colorado * Helvetia * Kentucky *
Pantano * Redington * San Rafael * Total Wreck * Twin Buttes *

Note: Pima, AZ is in Graham County - not Pima County

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