Williamson County, Texas Citizen Voting-age Population By Race and Ethnicity in 2018 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2018, the citizen voting-age population for Williamson County, TX was 356.55K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (241.48K) and constituted 67.72% of the total.

The Hispanic or Latino of All Races ethnicity group had the second highest citizen voting-age population (69.75K) and constituted 19.56% of the total. The Non-Hispanic Black or African American Alone ethnicity group had the third highest (22.63K), constituting 6.35% 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 Texas counties, and for Texas.

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

See this for other years:

Williamson County, Texas Citizen Voting-age Population By Race and Ethnicity in 2018

Non-Hispanic White Alone

Hispanic or Latino of All Races

Non-Hispanic Black Alone

Non-Hispanic Asian Alone

Non-Hispanic Two Or More Races

Non-Hispanic American Indian & Alaska Native Alone

Non-Hispanic Native Hawaiian & Pac. Islander Alone

Williamson County, Texas Citizen Voting-age Population By Race and Ethnicity in 2018

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Ethnicity	Voting-age Population	% of Voting-age Pop.
Non-Hispanic White Alone	241475	67.72
Hispanic or Latino of All Races	69745	19.56
Non-Hispanic Black or African American Alone	22625	6.35
Non-Hispanic Asian Alone	14500	4.07
Non-Hispanic Two Or More Races	7190	2.02
Non-Hispanic American Indian and Alaska Native Alone	700	0.20
Non-Hispanic Native Hawaiian And Pacific Islander Alone	315	0.09