Alhambra Valley is a census-designated place in the Briones Hills of central Contra Costa County, California. Alhambra Valley sits at an elevation of. The 2010 United States census reported that Alhambra Valley's population was 924.GeographyAccording to the United States Census Bureau, the CDP has a total area of 2.155 square miles (5.581 km²), all of it land.DemographicsThe 2010 United States Census reported that Alhambra Valley had a population of 924. The population density was 428.8 people per square mile (165.6/km²). The racial makeup of Alhambra Valley was 838 (90.7%) White, 3 (0.3%) African American, 0 (0.0%) Native American, 42 (4.5%) Asian, 5 (0.5%) Pacific Islander, 17 (1.8%) from other races, and 19 (2.1%) from two or more races. Hispanic or Latino of any race were 81 persons (8.8%).The Census reported that 100% of the population lived in households.There were 360 households, out of which 81 (22.5%) had children under the age of 18 living in them, 261 (72.5%) were opposite-sex married couples living together, 24 (6.7%) had a female householder with no husband present, 11 (3.1%) had a male householder with no wife present. There were 9 (2.5%) unmarried opposite-sex partnerships, and 3 (0.8%) same-sex married couples or partnerships. 51 households (14.2%) were made up of individuals and 26 (7.2%) had someone living alone who was 65 years of age or older. The average household size was 2.57. There were 296 families (82.2% of all households); the average family size was 2.77.
