Eagle Mountain is a city in Utah County, Utah, United States. It is part of the Provo–Orem, Utah Metropolitan Statistical Area. The city is located to the west of the Lake Mountains, which are west of Utah Lake. It was incorporated December 3, 1996 and has been rapidly growing ever since. The population was 21,415 at the 2010 census. Although Eagle Mountain was a town in 2000, it has since been classified as a fourth-class city by state law.