St. Clair County, Illinois Citizen Voting-age Population By Race and Ethnicity in 2024 (ACS-5Yrs)

Updated on March 26, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2024, the citizen voting-age population for St. Clair County, IL was 191.81K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (122.61K) and constituted 63.92% of the total.

The Non-Hispanic Black or African American Alone ethnicity group had the second highest citizen voting-age population (52.86K) and constituted 27.56% of the total. The Non-Hispanic Two Or More Races ethnicity group had the third highest (6.97K), constituting 3.63% 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 2024

Non-Hispanic White Alone

Non-Hispanic Black Alone

Non-Hispanic Two Or More Races

Hispanic or Latino of All 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 2024

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Ethnicity	Voting-age Population	% of Voting-age Pop.
Non-Hispanic White Alone	122605	63.92
Non-Hispanic Black or African American Alone	52861	27.56
Non-Hispanic Two Or More Races	6969	3.63
Hispanic or Latino of All Races	6877	3.59
Non-Hispanic Asian Alone	2143	1.12
Non-Hispanic American Indian and Alaska Native Alone	355	0.19
Non-Hispanic Native Hawaiian And Pacific Islander Alone	3	0.00