Population By Race and Ethnicity in Contra Costa County, CA in 2018

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2018, the 1,150,840 population of Contra Costa County, California comprised of 296,201 people who identified as Hispanic (25.74%), and 854,639 people who identified as Non-Hispanic (74.26%).

Race: The White Alone population was the largest racial group in Contra Costa County, California with a population of 751,249 (65.28%); Asian Alone population was the second largest racial group with a population of 207,880 (18.06%); and Black or African American Alone was the third largest racial group with a population of 109,193 (9.49%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Contra Costa County, California in 2018, with a population of 497,611 (43.24%); the second largest ethnic group was White Alone - Hispanic with a population of 253,638 (22.04%); and the third largest ethnic group was Asian Alone - Non Hispanic with a population of 200,556 (17.43%).

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 2018
Total Population:
Race in Contra Costa County, CA in 2018
Total Population:
Ethnicity in Contra Costa County, CA in 2018
Total Population:
Population By Race in Contra Costa , CA in 2018
Race Population Percentage
Black or African American Alone 109,193 9.49%
White Alone 751,249 65.28%
American Indian and Alaska Native Alone 12,086 1.05%
Asian Alone 207,880 18.06%
Native Hawaiian And Pacific Islander Alone 6,955 0.6%
Two Or More Races 63,477 5.52%
Population By Ethnicity in Contra Costa , CA in 2018
Ethnicity Population Percentage
Black or African American Alone - Hispanic 9,266 0.81%
White Alone - Hispanic 253,638 22.04%
American Indian and Alaska Native Alone - Hispanic 8,833 0.77%
Asian Alone - Hispanic 7,324 0.64%
Native Hawaiian And Pacific Islander Alone - Hispanic 1,590 0.14%
Two Or More Races - Hispanic 15,550 1.35%
Black or African American Alone - Non Hispanic 99,927 8.68%
White Alone - Non Hispanic 497,611 43.24%
American Indian and Alaska Native Alone - Non Hispanic 3,253 0.28%
Asian Alone - Non Hispanic 200,556 17.43%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 5,365 0.47%
Two Or More Races - Non Hispanic 47,927 4.17%