Douglas is a city in Cochise County, Arizona, United States that lies in the north-west to south-east executive Sulpher Springs Valley. Douglas has a link up crossing in the same way as Mexico at Agua Prieta and a chronicles of mining.

The population was 16,531 in the 2020 Census.

The Douglas Place was first contracted by the Spanish in the 18th century. Presidio de San Bernardino was customary in 1776 and unaided in 1780. It was located a few miles east of present-day Douglas. The United States Army customary Camp San Bernardino in the latter half of the 19th century near the presidio, and in 1910 Camp Douglas was built next to the town.

Douglas was founded as an American smelter town, to treat the copper ores of manageable Bisbee, Arizona. The town is named after mining traveler Dr. James Douglas and was incorporated in 1905. Two copper smelters operated at the site. The Calumet and Arizona Company Smelter was built in 1902. The Copper Queen operated in Douglas from 1904 until 1931, when the Phelps Dodge Corporation purchased the Calumet and Arizona Company and took over their smelter. The Calumet and Arizona smelter next became the Douglas Reduction Works. Douglas was the site of the Phelps-Dodge Corporation Douglas Reduction Works until its break in 1987. The smoke stacks of the smelter were not taken next to until January 13, 1991. The town was a site of the Arizona Copper Mine Strike of 1983.