Rock County, Wisconsin Citizen Voting-age Population By Race and Ethnicity in 2021 (ACS-5Yrs)

Updated on March 26, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2021, the citizen voting-age population for Rock County, WI was 121.42K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (107.14K) and constituted 88.24% of the total.

The Hispanic or Latino of All Races ethnicity group had the second highest citizen voting-age population (5.84K) and constituted 4.81% of the total. The Non-Hispanic Black or African American Alone ethnicity group had the third highest (5.37K), constituting 4.42% 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 Wisconsin counties, and for Wisconsin.

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

See this for other years:

Rock County, Wisconsin Citizen Voting-age Population By Race and Ethnicity in 2021

Non-Hispanic White Alone

Hispanic or Latino of All Races

Non-Hispanic Black Alone

Non-Hispanic Two Or More Races

Non-Hispanic Asian Alone

Non-Hispanic American Indian & Alaska Native Alone

Non-Hispanic Native Hawaiian & Pac. Islander Alone

Rock County, Wisconsin Citizen Voting-age Population By Race and Ethnicity in 2021

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Ethnicity	Voting-age Population	% of Voting-age Pop.
Non-Hispanic White Alone	107140	88.24
Hispanic or Latino of All Races	5840	4.81
Non-Hispanic Black or African American Alone	5365	4.42
Non-Hispanic Two Or More Races	1715	1.41
Non-Hispanic Asian Alone	1050	0.87
Non-Hispanic American Indian and Alaska Native Alone	290	0.24
Non-Hispanic Native Hawaiian And Pacific Islander Alone	20	0.02