Willcox is a city in Cochise County, Arizona, United States. The city is located in the Sulphur Springs Valley, a flat and sparsely populated drainage basin dotted with seasonal lakes. The city is surrounded by Arizona's most prominent mountain ranges, including the Pinaleño Mountains and the Chiricahua Mountains.

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.