Population By Race and Ethnicity in Contra Costa County, CA in 2021

Updated on July 31, 2024.

Based on the US Census Vintage data estimates, in 2021, the 1,163,941 population of Contra Costa County, California comprised of 317,499 people who identified as Hispanic (27.28%), and 846,442 people who identified as Non-Hispanic (72.72%).

Race: The White Alone population was the largest racial group in Contra Costa County, California with a population of 742,230 (63.77%); Asian Alone population was the second largest racial group with a population of 225,344 (19.36%); and Black or African American Alone was the third largest racial group with a population of 109,751 (9.43%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Contra Costa County, California in 2021, with a population of 471,105 (40.48%); the second largest ethnic group was White Alone - Hispanic with a population of 271,125 (23.29%); and the third largest ethnic group was Asian Alone - Non Hispanic with a population of 217,189 (18.66%).

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 2021
Total Population:
Race in Contra Costa County, CA in 2021
Total Population:
Ethnicity in Contra Costa County, CA in 2021
Total Population:
Population By Race in Contra Costa , CA in 2021
Race Population Percentage
Black or African American Alone 109,751 9.43%
White Alone 742,230 63.77%
American Indian and Alaska Native Alone 12,745 1.1%
Asian Alone 225,344 19.36%
Native Hawaiian And Pacific Islander Alone 7,338 0.63%
Two Or More Races 66,533 5.72%
Population By Ethnicity in Contra Costa , CA in 2021
Ethnicity Population Percentage
Black or African American Alone - Hispanic 10,125 0.87%
White Alone - Hispanic 271,125 23.29%
American Indian and Alaska Native Alone - Hispanic 9,636 0.83%
Asian Alone - Hispanic 8,155 0.7%
Native Hawaiian And Pacific Islander Alone - Hispanic 1,699 0.15%
Two Or More Races - Hispanic 16,759 1.44%
Black or African American Alone - Non Hispanic 99,626 8.56%
White Alone - Non Hispanic 471,105 40.48%
American Indian and Alaska Native Alone - Non Hispanic 3,109 0.27%
Asian Alone - Non Hispanic 217,189 18.66%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 5,639 0.48%
Two Or More Races - Non Hispanic 49,774 4.28%