The Copper Mountains is a minor north–south trending mountain range, only 8 miles long in southwestern Arizona in the southwestern Sonoran Desert.

It lies on an extensive north-sloping desert plain that drains into the Gila River floodplain close to its confluence and outlet into the southern Colorado River in the Lower Colorado River Valley.

The highest point is Coyote Peak at 2,808 feet (856 m).

The communities just north at about 10 miles in the Gila River agricultural valley, are Wellton, Noah, Roll, and Tacna, Arizona.

The Copper Mountains lie in the western portion of the Barry M. Goldwater Air Force Range which is used by the MCAS, the Marine Corps Air Station, Yuma; also 3 miles north of the western end of the Cabeza Prieta National Wildlife Refuge.