San Mateo County, California Citizen Voting-age Population By Race and Ethnicity in 2024 (ACS-5Yrs)

Updated on March 26, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2024, the citizen voting-age population for San Mateo County, CA was 494.55K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (213.19K) and constituted 43.11% of the total.

The Non-Hispanic Asian Alone ethnicity group had the second highest citizen voting-age population (151.06K) and constituted 30.55% of the total. The Hispanic or Latino of All Races ethnicity group had the third highest (96.26K), constituting 19.46% 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:

San Mateo County, California Citizen Voting-age Population By Race and Ethnicity in 2024

Non-Hispanic White Alone

Non-Hispanic Asian Alone

Hispanic or Latino of All Races

Non-Hispanic Two Or More Races

Non-Hispanic Black Alone

Non-Hispanic Native Hawaiian & Pac. Islander Alone

Non-Hispanic American Indian & Alaska Native Alone

San Mateo County, California Citizen Voting-age Population By Race and Ethnicity in 2024

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Ethnicity	Voting-age Population	% of Voting-age Pop.
Non-Hispanic White Alone	213191	43.11
Non-Hispanic Asian Alone	151063	30.55
Hispanic or Latino of All Races	96256	19.46
Non-Hispanic Two Or More Races	15588	3.15
Non-Hispanic Black or African American Alone	12468	2.52
Non-Hispanic Native Hawaiian And Pacific Islander Alone	5400	1.09
Non-Hispanic American Indian and Alaska Native Alone	583	0.12