Greenlee County, Arizona
![Map of Arizona highlighting Greenlee County](/Images/godic/202501/16/Map_of_Arizona_highlighting_Greenlee_County.svg0443.png")
![Map of the United States highlighting Arizona](/Images/godic/202501/16/Map_of_USA_AZ.svg0443.png")
![1901 Clifton railroad station, now used by the Chamber of Commerce and other community organizations.](/Images/godic/202501/16/Clifton,_AZ_train_station0443.jpg")
![Azurite specimen from the great Morenci Mine.](/Images/godic/202501/16/Azurite-2847140443.jpg")
Greenlee County is a county located in the southeastern part of the U.S. state of Arizona. As of the 2010 census its population was 8,437, making it the least populous county in Arizona. The county seat is Clifton.
The economy of Greenlee County is dominated by the Morenci Mine, the largest copper mining operation in North America, and one of the largest copper mines in the world. As of 2008, the mine complex, owned by Freeport-McMoRan, had about 4,000 employees.