Fountain Hills is a town in Maricopa County, Arizona, United States. Known for its impressive fountain, once the tallest in the world, it borders the Fort McDowell Yavapai Nation, Salt River Pima-Maricopa Indian Community, and Scottsdale. The population was 23,820 as of the 2020 census. Between the 1990 and 2000 censuses it was the eighth-fastest-growing place among cities and towns in Arizona. The median value of an owner-occupied housing during the period 2016-2020 was estimated at $402,100.