Population By Race and Ethnicity in Rock Island, IL in 2021

Updated on June 16, 2025.

Based on the US Census Vintage data estimates, in 2021, the 142,923 population of Rock Island County, Illinois comprised of 20,038 people who identified as Hispanic (14.02%), and 122,885 people who identified as Non-Hispanic (85.98%).

Race: The White Alone population was the largest racial group in Rock Island County, Illinois with a population of 116,429 (81.46%); Black or African American Alone population was the second largest racial group with a population of 16,903 (11.83%); and Two Or More Races was the third largest racial group with a population of 4,684 (3.28%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Rock Island County, Illinois in 2021, with a population of 98,936 (69.22%); the second largest ethnic group was White Alone - Hispanic with a population of 17,493 (12.24%); and the third largest ethnic group was Black or African American Alone - Non Hispanic with a population of 15,998 (11.19%).

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

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

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Hispanics and Non Hispanics in Rock Island, IL in 2021
Total Population:
Race in Rock Island, IL in 2021
Total Population:
Ethnicity in Rock Island, IL in 2021
Total Population:
Population By Race in Rock Island , IL in 2021
Race Population Percentage
Black or African American Alone 16,903 11.83%
White Alone 116,429 81.46%
American Indian and Alaska Native Alone 931 0.65%
Asian Alone 3,904 2.73%
Native Hawaiian And Pacific Islander Alone 72 0.05%
Two Or More Races 4,684 3.28%
Population By Ethnicity in Rock Island , IL in 2021
Ethnicity Population Percentage
Black or African American Alone - Hispanic 905 0.63%
White Alone - Hispanic 17,493 12.24%
American Indian and Alaska Native Alone - Hispanic 653 0.46%
Asian Alone - Hispanic 151 0.11%
Native Hawaiian And Pacific Islander Alone - Hispanic 24 0.02%
Two Or More Races - Hispanic 812 0.57%
Black or African American Alone - Non Hispanic 15,998 11.19%
White Alone - Non Hispanic 98,936 69.22%
American Indian and Alaska Native Alone - Non Hispanic 278 0.2%
Asian Alone - Non Hispanic 3,753 2.63%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 48 0.03%
Two Or More Races - Non Hispanic 3,872 2.71%