Rock Island County, Illinois Population By Race and Ethnicity in 2021 (ACS-5Yrs)

Updated on July 13, 2024.

Based on the US Census ACS-5Yrs estimates, in 2021, the total Rock Island County, IL population was 144,694. The White Alone racial group had the highest population (111.55K) and constituted 77.09% of the total Rock Island County population. The Black or African American Alone racial group had the second highest population (15.86K) and constituted 10.96% of the population. The third highest racial group was Two Or More Races (8.06K), constituting 5.57% of the population.

The population of the Non-Hispanic White Alone ethnicity group was 102.08K and constituted 70.55% of the population. The population of the Hispanic or Latino of All Races ethnicity group was (19.25K) and constituted 13.30% of the population.

The charts and tables below shows the population and percentages by race and ethnicity.

Note: Missing racial or ethnicity groups means there was not enough information for an estimate.

You can also see similar information for other Illinois counties, and for Illinois.

Rock Island County, Illinois Population By Race in 2021
White Alone
Black or African American Alone
Two Or More Races
Some Other Race Alone
Asian Alone
American Indian and Alaska Native Alone
Native Hawaiian And Pacific Islander Alone
Rock Island County, Illinois Population By Ethnicity in 2021
Non-Hispanic White Alone
Hispanic or Latino of All Races
Rock Island County, Illinois Population By Race in 2021
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Race Population % of Total Pop.
White Alone 111548 77.09
Black or African American Alone 15864 10.96
Two Or More Races 8058 5.57
Some Other Race Alone 4869 3.37
Asian Alone 3723 2.57
American Indian and Alaska Native Alone 410 0.28
Native Hawaiian And Pacific Islander Alone 222 0.15
Rock Island County, Illinois Population By Ethnicity in 2021
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Ethnicity Population % of Total Pop.
Non-Hispanic White Alone 102083 70.55
Hispanic or Latino of All Races 19246 13.30