Contra Costa County, California Citizen Voting-age Population By Race and Ethnicity in 2020 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2020, the citizen voting-age population for Contra Costa County, CA was 773.98K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (397.52K) and constituted 51.36% of the total.

The Hispanic or Latino of All Races ethnicity group had the second highest citizen voting-age population (146.28K) and constituted 18.90% of the total. The Non-Hispanic Asian Alone ethnicity group had the third highest (120.24K), constituting 15.54% of the total citizen voting-age population.

The charts and tables below shows the citizen voting-age population and percentages by race and ethnicity.

You can also see similar information for other California counties, and for California.

Data Source: US Census - ACS 5-Years (CVAP).

See this for other years:

Contra Costa County, California Citizen Voting-age Population By Race and Ethnicity in 2020

Non-Hispanic White Alone

Hispanic or Latino of All Races

Non-Hispanic Asian Alone

Non-Hispanic Black Alone

Non-Hispanic Two Or More Races

Non-Hispanic Native Hawaiian & Pac. Islander Alone

Non-Hispanic American Indian & Alaska Native Alone

Contra Costa County, California Citizen Voting-age Population By Race and Ethnicity in 2020

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Ethnicity	Voting-age Population	% of Voting-age Pop.
Non-Hispanic White Alone	397515	51.36
Hispanic or Latino of All Races	146275	18.90
Non-Hispanic Asian Alone	120240	15.54
Non-Hispanic Black or African American Alone	72740	9.40
Non-Hispanic Two Or More Races	31985	4.13
Non-Hispanic Native Hawaiian And Pacific Islander Alone	3390	0.44
Non-Hispanic American Indian and Alaska Native Alone	1835	0.24