Circle City is an unincorporated community and census-designated place (CDP) in Maricopa County, Arizona, United States, located 17 miles (27 km) northwest of Surprise on U.S. Route 60. As of the 2020 census, the population was 522. The development was built in the late 1950s by The Workmen's Circle, a Jewish fraternal and mutual aid society with roots in the socialist movement of the early 20th century, as a retirement community for its aging members.