Population By Race and Ethnicity in Contra Costa County, CA in 2011

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2011, the 1,065,361 population of Contra Costa County, California comprised of 261,467 people who identified as Hispanic (24.54%), and 803,894 people who identified as Non-Hispanic (75.46%).

Race: The White Alone population was the largest racial group in Contra Costa County, California with a population of 730,472 (68.57%); Asian Alone population was the second largest racial group with a population of 163,637 (15.36%); and Black or African American Alone was the third largest racial group with a population of 103,331 (9.7%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Contra Costa County, California in 2011, with a population of 504,246 (47.33%); the second largest ethnic group was White Alone - Hispanic with a population of 226,226 (21.24%); and the third largest ethnic group was Asian Alone - Non Hispanic with a population of 157,429 (14.78%).

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 2011
Total Population:
Race in Contra Costa County, CA in 2011
Total Population:
Ethnicity in Contra Costa County, CA in 2011
Total Population:
Population By Race in Contra Costa , CA in 2011
Race Population Percentage
Black or African American Alone 103,331 9.7%
White Alone 730,472 68.57%
American Indian and Alaska Native Alone 10,375 0.97%
Asian Alone 163,637 15.36%
Native Hawaiian And Pacific Islander Alone 5,971 0.56%
Two Or More Races 51,575 4.84%
Population By Ethnicity in Contra Costa , CA in 2011
Ethnicity Population Percentage
Black or African American Alone - Hispanic 7,858 0.74%
White Alone - Hispanic 226,226 21.24%
American Indian and Alaska Native Alone - Hispanic 7,352 0.69%
Asian Alone - Hispanic 6,208 0.58%
Native Hawaiian And Pacific Islander Alone - Hispanic 1,369 0.13%
Two Or More Races - Hispanic 12,454 1.17%
Black or African American Alone - Non Hispanic 95,473 8.96%
White Alone - Non Hispanic 504,246 47.33%
American Indian and Alaska Native Alone - Non Hispanic 3,023 0.28%
Asian Alone - Non Hispanic 157,429 14.78%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 4,602 0.43%
Two Or More Races - Non Hispanic 39,121 3.67%