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

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2021, the 142,992 population of Rock Island County, Illinois comprised of 19,662 people who identified as Hispanic (13.75%), and 123,330 people who identified as Non-Hispanic (86.25%).

Race: The White Alone population was the largest racial group in Rock Island County, Illinois with a population of 116,491 (81.47%); Black or African American Alone population was the second largest racial group with a population of 16,889 (11.81%); and Two Or More Races was the third largest racial group with a population of 4,689 (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 99,349 (69.48%); the second largest ethnic group was White Alone - Hispanic with a population of 17,142 (11.99%); 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 County, IL in 2021
Total Population:
Race in Rock Island County, IL in 2021
Total Population:
Ethnicity in Rock Island County, IL in 2021
Total Population:
Population By Race in Rock Island , IL in 2021
Race Population Percentage
Black or African American Alone 16,889 11.81%
White Alone 116,491 81.47%
American Indian and Alaska Native Alone 926 0.65%
Asian Alone 3,928 2.75%
Native Hawaiian And Pacific Islander Alone 69 0.05%
Two Or More Races 4,689 3.28%
Population By Ethnicity in Rock Island , IL in 2021
Ethnicity Population Percentage
Black or African American Alone - Hispanic 891 0.62%
White Alone - Hispanic 17,142 11.99%
American Indian and Alaska Native Alone - Hispanic 651 0.46%
Asian Alone - Hispanic 150 0.11%
Native Hawaiian And Pacific Islander Alone - Hispanic 21 0.02%
Two Or More Races - Hispanic 807 0.56%
Black or African American Alone - Non Hispanic 15,998 11.19%
White Alone - Non Hispanic 99,349 69.48%
American Indian and Alaska Native Alone - Non Hispanic 275 0.19%
Asian Alone - Non Hispanic 3,778 2.64%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 48 0.03%
Two Or More Races - Non Hispanic 3,882 2.72%