St. Clair County, Illinois Citizen Voting-age Population By Race and Ethnicity in 2015 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2015, the citizen voting-age population for St. Clair County, IL was 199.14K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (132.22K) and constituted 66.40% of the total.

The Non-Hispanic Black or African American Alone ethnicity group had the second highest citizen voting-age population (56.70K) and constituted 28.47% of the total. The Hispanic or Latino of All Races ethnicity group had the third highest (4.97K), constituting 2.50% 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 2015

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 2015

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Ethnicity	Voting-age Population	% of Voting-age Pop.
Non-Hispanic White Alone	132215	66.40
Non-Hispanic Black or African American Alone	56695	28.47
Hispanic or Latino of All Races	4975	2.50
Non-Hispanic Two Or More Races	2570	1.29
Non-Hispanic Asian Alone	2230	1.12
Non-Hispanic American Indian and Alaska Native Alone	395	0.20
Non-Hispanic Native Hawaiian And Pacific Islander Alone	60	0.03