St. Clair County, Illinois Citizen Voting-age Population By Race and Ethnicity in 2020 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2020, the citizen voting-age population for St. Clair County, IL was 196.27K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (128.18K) and constituted 65.31% of the total.

The Non-Hispanic Black or African American Alone ethnicity group had the second highest citizen voting-age population (56.77K) and constituted 28.92% of the total. The Hispanic or Latino of All Races ethnicity group had the third highest (5.63K), constituting 2.87% 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:

St. Clair County, Illinois Citizen Voting-age Population By Race and Ethnicity in 2020

Non-Hispanic White Alone

Non-Hispanic Black Alone

Hispanic or Latino of All Races

Non-Hispanic Two Or More Races

Non-Hispanic Asian Alone

Non-Hispanic American Indian & Alaska Native Alone

Non-Hispanic Native Hawaiian & Pac. Islander Alone

St. Clair County, Illinois Citizen Voting-age Population By Race and Ethnicity in 2020

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Ethnicity	Voting-age Population	% of Voting-age Pop.
Non-Hispanic White Alone	128180	65.31
Non-Hispanic Black or African American Alone	56765	28.92
Hispanic or Latino of All Races	5625	2.87
Non-Hispanic Two Or More Races	3290	1.68
Non-Hispanic Asian Alone	2095	1.07
Non-Hispanic American Indian and Alaska Native Alone	300	0.15
Non-Hispanic Native Hawaiian And Pacific Islander Alone	15	0.01