Alhambra Valley (, ) is a census-designated place in the Briones Hills of central Contra Costa County, California, United States. Alhambra Valley sits at an elevation of . The 2020 United States census reported that Alhambra Valley's population was 805. The Spanish name of the valley was "Valley of Hunger"; it was adapted into English with obvious influence from "Alhambra".

Geography According to the United States Census Bureau, the CDP has a total area of 1.61 square miles (4.18 km), all land.

Demographics

Alhambra Valley first appeared as a census designated place in the 2010 U.S. census.

2020 census

As of the 2020 census, Alhambra Valley had a population of 805, with a population density of . The median age was 53.1 years. The age distribution was 17.6% under the age of 18, 6.6% aged 18 to 24, 16.6% aged 25 to 44, 31.4% aged 45 to 64, and 27.7% who were 65years of age or older. For every 100 females there were 95.4 males, and for every 100 females age 18 and over there were 96.2 males age 18 and over.

The census reported that 100% of the population lived in households. 84.6% of residents lived in urban areas, while 15.4% lived in rural areas.

There were 308 households, of which 23.1% had children under the age of 18 living in them. Of all households, 66.9% were married-couple households, 3.9% were cohabiting couple households, 11.4% had a male householder with no partner present, and 17.9% had a female householder with no partner present. About 15.9% of all households were made up of individuals, and 11.0% had someone living alone who was 65 years of age or older. The average household size was 2.61. There were 252 families (81.8% of all households).

There were 319 housing units at an average density of , of which 308 (96.6%) were occupied. Of these, 93.2% were owner-occupied, and 6.8% were occupied by renters. Of all housing units, 3.4% were vacant; the homeowner vacancy rate was 0.7% and the rental vacancy rate was 19.2%.

+ Racial composition as of the 2020 census Race Number Percent White 631 78.4% Black or African American 11 1.4% American Indian and Alaska Native 3 0.4% Asian 28 3.5% Native Hawaiian and Other Pacific Islander 3 0.4% Some other race 32 4.0% Two or more races 97 12.0% Hispanic or Latino (of any race) 100 12.4%

Education The CDP is served by Martinez Unified School District. - Text list

References