Sun City is a former census-designated place (CDP) in Riverside County, California, United States. Along with the neighboring communities of Quail Valley and Menifee, it was incorporated as the City of Menifee on October 1, 2008. The population when Sun City was a CDP was 17,773 at the 2000 census. Sun City is located along Interstate 215 just south of the city of Perris.
Sun City is a master-planned community for senior citizens over age 55. The four-square mile residential community has one public golf course, two recreation centers with tennis courts and swimming pools, and a commercial center of supermarkets and small retail shops for local resident consumers.
Originally built in 1960, it was one of four "Sun Cities" designed by Del Webb who later created retirement communities in Arizona, Nevada and Florida in the 1970s and '80s. The Del Webb company opened Sun City Palm Desert, California east of Palm Springs in 1991.
Another development boom arrived in the late 1980s and 1990s with Menifee as another master-planned community on the southeast edge of Sun City, and as of 2005, the one-square-mile area of homes, condos, schools, retail shops, golf courses and tennis courts still grows.
Menifee Valley Medical Center, located east of Interstate 215 on McCall Boulevard, is a General Acute Care Hospital in Sun City with Basic Emergency Services as of 2005.
Sun City is located at 33°42′29″N 117°11′56″W.
According to the United States Census Bureau, the CDP had a total area of 7.8 square miles (20.2 km²), all of it land.