San Mateo County, California Citizen Voting-age Population By Race and Ethnicity in 2017 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2017, the citizen voting-age population for San Mateo County, CA was 494.91K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (239.94K) and constituted 48.48% of the total.

The Non-Hispanic Asian Alone ethnicity group had the second highest citizen voting-age population (133.24K) and constituted 26.92% of the total. The Hispanic or Latino of All Races ethnicity group had the third highest (87.00K), constituting 17.58% 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 2017

Non-Hispanic White Alone

Non-Hispanic Asian Alone

Hispanic or Latino of All Races

Non-Hispanic Black Alone

Non-Hispanic Two Or More Races

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 2017

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Ethnicity	Voting-age Population	% of Voting-age Pop.
Non-Hispanic White Alone	239935	48.48
Non-Hispanic Asian Alone	133235	26.92
Hispanic or Latino of All Races	86995	17.58
Non-Hispanic Black or African American Alone	14265	2.88
Non-Hispanic Two Or More Races	13325	2.69
Non-Hispanic Native Hawaiian And Pacific Islander Alone	6360	1.29
Non-Hispanic American Indian and Alaska Native Alone	800	0.16