Rock Island County, Illinois 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 Island County, IL was 106.22K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (84.07K) and constituted 79.14% of the total.

The Hispanic or Latino of All Races ethnicity group had the second highest citizen voting-age population (9.89K) and constituted 9.31% of the total. The Non-Hispanic Black or African American Alone ethnicity group had the third highest (8.90K), constituting 8.38% 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 Illinois counties, and for Illinois.

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

See this for other years:

Rock Island County, Illinois 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 Island County, Illinois 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	84065	79.14
Hispanic or Latino of All Races	9885	9.31
Non-Hispanic Black or African American Alone	8905	8.38
Non-Hispanic Two Or More Races	2145	2.02
Non-Hispanic Asian Alone	1030	0.97
Non-Hispanic American Indian and Alaska Native Alone	150	0.14
Non-Hispanic Native Hawaiian And Pacific Islander Alone	30	0.03