Anza is a census-designated place located in southern Riverside County, California, in the Anza Valley, a semi-arid region at a mean elevation of 3,921 feet above sea level. It is located 13 miles south of Idyllwild, and approximately 35 miles southwest of Palm Springs, 143 miles southeast of Los Angeles, California and approximately 75 miles northeast of San Diego, California, being traversed by State Route 371. The population was 3,014 at the 2010 census.Locally, Anza and several other mountain communities are collectively referred to as "the Hill."The ZIP code is 92539, and the community is inside area code 951.