Cochise County, Arizona
| Cochise County | |
|---|---|
| County | |
| The art deco county courthouse in Bisbee | |
| Location within the U.S. state of Arizona | |
| Arizona's location within the U.S. | |
| Coordinates: 31°52′N 109°45′W / 31.867°N 109.750°W | |
| Country | United States | 
| State | Arizona | 
| Founded | February 1, 1881 | 
| Named after | Cochise | 
| Seat | Bisbee | 
| Largest city | Sierra Vista | 
| Area | |
|  • Total | 6,219 sq mi (16,110 km2) | 
| • Land | 6,166 sq mi (15,970 km2) | 
| • Water | 53 sq mi (140 km2) 0.9% | 
| Population  (2020) | |
|  • Total | 125,447 | 
|  • Estimate  (2024) | 125,773 | 
| • Density | 20/sq mi (7.8/km2) | 
| Time zone | UTC−7 (Mountain) | 
| Congressional districts | 6th, 7th | 
| Website | www | 
Cochise County (/koʊˈtʃiːs/ koh-CHEESS) is a county in the southeastern corner of the U.S. state of Arizona. It is named after Cochise, a Chiricahua Apache who was a key war leader during the Apache Wars.
The population was 125,447 at the 2020 census. The county seat is Bisbee and the most populous city is Sierra Vista.
Cochise County includes the Sierra Vista-Douglas, Arizona Metropolitan Statistical Area. The county borders southwestern New Mexico and the northwestern Mexican state of Sonora.