Clifton is a town in and is the county seat of Greenlee County, Arizona, United States, along the San Francisco River. The population of the town was 3,311 at the 2010 census, with a 2018 population estimate of 3,700. It was a place of the Arizona copper mine strike of 1983.
Rio Rico is an unincorporated community and census-designated place (CDP) in Santa Cruz County, Arizona, United States. The population was 18,962 at the 2010 census.The Rio Rico CDP replaced the former CDP's of Rio Rico Northwest, Rio Rico Northeast, Rio Rico Southwest, and Rio Rico Southeast.