O'Fallon city, Illinois Citizen Voting-age Population By Race and Ethnicity in 2024 (ACS-5Yrs)

Updated on March 27, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2024, the citizen voting-age population for O'Fallon city, Illinois was 23.47K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (17.27K) and constituted 73.60% of the total.

The Non-Hispanic Black or African American Alone ethnicity group had the second highest citizen voting-age population (4.06K) and constituted 17.28% of the total. The Hispanic or Latino of All Races ethnicity group had the third highest (824), constituting 3.51% 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 cities and places, and for Illinois.

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

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O'Fallon city, Illinois Citizen Voting-age Population By Race and Ethnicity in 2024

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

O'Fallon city, 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	17274	73.60
Non-Hispanic Black or African American Alone	4056	17.28
Hispanic or Latino of All Races	824	3.51
Non-Hispanic Two Or More Races	709	3.02
Non-Hispanic Asian Alone	583	2.48
Non-Hispanic American Indian and Alaska Native Alone	23	0.10