Population By Race and Ethnicity in Rock County, WI in 2018

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2018, the 162,817 population of Rock County, Wisconsin comprised of 14,780 people who identified as Hispanic (9.08%), and 148,037 people who identified as Non-Hispanic (90.92%).

Race: The White Alone population was the largest racial group in Rock County, Wisconsin with a population of 146,543 (90.01%); Black or African American Alone population was the second largest racial group with a population of 8,745 (5.37%); and Two Or More Races was the third largest racial group with a population of 4,408 (2.71%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Rock County, Wisconsin in 2018, with a population of 133,686 (82.11%); the second largest ethnic group was White Alone - Hispanic with a population of 12,857 (7.9%); and the third largest ethnic group was Black or African American Alone - Non Hispanic with a population of 8,145 (5%).

The charts and tables below shows the population and percentage of each racial and ethnicity group in Rock, Wisconsin.

You can find similar information for other Wisconsin counties, and for Wisconsin.

See this for other years:
Hispanics and Non Hispanics in Rock County, WI in 2018
Total Population:
Race in Rock County, WI in 2018
Total Population:
Ethnicity in Rock County, WI in 2018
Total Population:
Population By Race in Rock , WI in 2018
Race Population Percentage
Black or African American Alone 8,745 5.37%
White Alone 146,543 90.01%
American Indian and Alaska Native Alone 865 0.53%
Asian Alone 2,154 1.32%
Native Hawaiian And Pacific Islander Alone 102 0.06%
Two Or More Races 4,408 2.71%
Population By Ethnicity in Rock , WI in 2018
Ethnicity Population Percentage
Black or African American Alone - Hispanic 600 0.37%
White Alone - Hispanic 12,857 7.9%
American Indian and Alaska Native Alone - Hispanic 477 0.29%
Asian Alone - Hispanic 98 0.06%
Native Hawaiian And Pacific Islander Alone - Hispanic 42 0.03%
Two Or More Races - Hispanic 706 0.43%
Black or African American Alone - Non Hispanic 8,145 5%
White Alone - Non Hispanic 133,686 82.11%
American Indian and Alaska Native Alone - Non Hispanic 388 0.24%
Asian Alone - Non Hispanic 2,056 1.26%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 60 0.04%
Two Or More Races - Non Hispanic 3,702 2.27%