Johnson 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 Johnson County, IL was 10.60K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (9.14K) and constituted 86.22% of the total.

The Non-Hispanic Black or African American Alone ethnicity group had the second highest citizen voting-age population (1.21K) and constituted 11.37% of the total. The Hispanic or Latino of All Races ethnicity group had the third highest (160), constituting 1.51% 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:

Johnson County, Illinois Citizen Voting-age Population By Race and Ethnicity in 2021

Non-Hispanic White Alone

Non-Hispanic Black Alone

Hispanic or Latino of All Races

Non-Hispanic Two Or More Races

Non-Hispanic Asian Alone

Johnson 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	9135	86.22
Non-Hispanic Black or African American Alone	1205	11.37
Hispanic or Latino of All Races	160	1.51
Non-Hispanic Two Or More Races	70	0.66
Non-Hispanic Asian Alone	25	0.24