Douglas is a city in Cochise County, Arizona, United States that lies in the north-west to south-east running Sulphur Springs Valley. Douglas has a border crossing with Mexico at Agua Prieta and a history of mining.

Cochise County 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.