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 (1,195 m) above sea level. It is located 13 miles (21 km) south of Idyllwild, 32 miles (51 km) east-northeast of Temecula, 40 miles (64 km) southwest of Palm Springs, and 90 miles (140 km) northeast of San Diego, being traversed by State Route 371. The population was 3,014 at the 2010 census.
According to the United States Census Bureau, the CDP covers an area of 27.7 square miles (71.7 km²), 99.70% of it land and 0.30% of it water.
Regional geographic subdivisions of the unincorporated town include Anza Valley and Cave Rocks (Central); Tripp Flats, Chandler Heights and Cahuilla (West) as well as Oak Spring, Burnt Spring and Heller Spring (East). The Anza Valley in which the unincorporated town is nestled is bordered by three significant mountains: Cahuilla Mountain to the west, Thomas Mountain to the northeast and Beauty Mountain to the southwest.
The area is characterized as high desert, experiencing somewhat stronger temperature variations than those of the coastal cities, including sudden dips of temperature even on summer evenings, due to the high elevation. The Anza Trail—originally travelled on horseback by Juan Bautista de Anza in 1774 through what was then referred to as the Cahuilla Valley—traverses the city from southeast to northwest.
The 2010 United States Census reported that Anza had a population of 3,014. The population density was 108.9 people per square mile (42.0/km²). The racial makeup of Anza was 2,411 (80.0%) White (67.5% Non-Hispanic White), 34 (1.1%) African American, 57 (1.9%) Native American, 36 (1.2%) Asian, 3 (0.1%) Pacific Islander, 347 (11.5%) from other races, and 126 (4.2%) from two or more races. Hispanic or Latino of any race were 791 persons (26.2%).
The Census reported that 3,014 people (100% of the population) lived in households, 0 (0%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.
There were 1,160 households, out of which 331 (28.5%) had children under the age of 18 living in them, 592 (51.0%) were opposite-sex married couples living together, 115 (9.9%) had a female householder with no husband present, 67 (5.8%) had a male householder with no wife present. There were 84 (7.2%) unmarried opposite-sex partnerships, and 14 (1.2%) same-sex married couples or partnerships. 294 households (25.3%) were made up of individuals and 106 (9.1%) had someone living alone who was 65 years of age or older. The average household size was 2.60. There were 774 families (66.7% of all households); the average family size was 3.10.
The population was spread out with 679 people (22.5%) under the age of 18, 215 people (7.1%) aged 18 to 24, 620 people (20.6%) aged 25 to 44, 1,003 people (33.3%) aged 45 to 64, and 497 people (16.5%) who were 65 years of age or older. The median age was 44.8 years. For every 100 females, there were 102.8 males. For every 100 females age 18 and over, there were 100.9 males.
There were 1,508 housing units at an average density of 54.5 per square mile (21.0/km²), of which 830 (71.6%) were owner-occupied, and 330 (28.4%) were occupied by renters. The homeowner vacancy rate was 3.7%; the rental vacancy rate was 8.8%. 2,103 people (69.8% of the population) lived in owner-occupied housing units and 911 people (30.2%) lived in rental housing units.
According to the 2010 United States Census, Anza had a median household income of $39,637, with 11.5% of the population living below the federal poverty line.