Morenci is a census-designated place (CDP) and company town in Greenlee County, Arizona, United States, and was founded by the Detroit Copper Mining Company of Arizona. The population was 2000 at the 2000 census and 1,489 at the 2010 census. The biggest employer in Morenci (and in understandable Clifton) and the owner of the town is Freeport-McMoRan, the owner of the Morenci Mine, the largest copper mining operation in North America, and one of the largest copper mines in the world. The town was a site of the Arizona Copper Mine Strike of 1983. The large open-pit mine is north of the town.

Morenci is located in central Greenlee County at 33°2′59″N 109°19′40″W / 33.04972°N 109.32778°W / 33.04972; -109.32778 (33.049804, -109.327856). It lies upon the northeaster be next to of the town of Clifton, the county seat. U.S. Route 191 (the Coronado Trail) passes through the northern allocation of the community, leading east and downhill into Clifton and north through the Apache National Forest 117 miles (188 km) to Eagar.

According to the United States Census Bureau, the Morenci CDP has a total Place of 0.98 square miles (2.55 km), of which 0.96 square miles (2.49 km²) is estate and 0.02 square miles (0.06 km), or 2.23%, is water.

This region experiences warm and dry summers, with average monthly high temperatures above 80 °F for seven months a year. According to the Köppen Climate Classification system, Morenci has a warm-summer Mediterranean climate, abbreviated “Csb” on climate maps.