Population By Race and Ethnicity in Contra Costa County, CA in 2015

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2015, the 1,124,148 population of Contra Costa County, California comprised of 282,339 people who identified as Hispanic (25.12%), and 841,809 people who identified as Non-Hispanic (74.88%).

Race: The White Alone population was the largest racial group in Contra Costa County, California with a population of 752,071 (66.9%); Asian Alone population was the second largest racial group with a population of 188,224 (16.74%); and Black or African American Alone was the third largest racial group with a population of 107,067 (9.52%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Contra Costa County, California in 2015, with a population of 509,283 (45.3%); the second largest ethnic group was White Alone - Hispanic with a population of 242,788 (21.6%); and the third largest ethnic group was Asian Alone - Non Hispanic with a population of 181,370 (16.13%).

The charts and tables below shows the population and percentage of each racial and ethnicity group in Contra Costa, California.

You can find similar information for other California counties, and for California.

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Hispanics and Non Hispanics in Contra Costa County, CA in 2015
Total Population:
Race in Contra Costa County, CA in 2015
Total Population:
Ethnicity in Contra Costa County, CA in 2015
Total Population:
Population By Race in Contra Costa , CA in 2015
Race Population Percentage
Black or African American Alone 107,067 9.52%
White Alone 752,071 66.9%
American Indian and Alaska Native Alone 11,506 1.02%
Asian Alone 188,224 16.74%
Native Hawaiian And Pacific Islander Alone 6,445 0.57%
Two Or More Races 58,835 5.23%
Population By Ethnicity in Contra Costa , CA in 2015
Ethnicity Population Percentage
Black or African American Alone - Hispanic 8,648 0.77%
White Alone - Hispanic 242,788 21.6%
American Indian and Alaska Native Alone - Hispanic 8,233 0.73%
Asian Alone - Hispanic 6,854 0.61%
Native Hawaiian And Pacific Islander Alone - Hispanic 1,471 0.13%
Two Or More Races - Hispanic 14,345 1.28%
Black or African American Alone - Non Hispanic 98,419 8.76%
White Alone - Non Hispanic 509,283 45.3%
American Indian and Alaska Native Alone - Non Hispanic 3,273 0.29%
Asian Alone - Non Hispanic 181,370 16.13%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 4,974 0.44%
Two Or More Races - Non Hispanic 44,490 3.96%