O'Fallon city, Illinois Citizen Voting-age Population By Race and Ethnicity in 2010 (ACS-5Yrs)

Updated on March 26, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2010, the citizen voting-age population for O'Fallon city, Illinois was 18.87K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (15.01K) and constituted 79.54% of the total.

The Non-Hispanic Black or African American Alone ethnicity group had the second highest citizen voting-age population (2.83K) and constituted 14.97% of the total. The Hispanic or Latino of All Races ethnicity group had the third highest (405), constituting 2.15% 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).

See this for other years:

O'Fallon city, Illinois Citizen Voting-age Population By Race and Ethnicity in 2010

Non-Hispanic White Alone

Non-Hispanic Black Alone

Hispanic or Latino of All Races

Non-Hispanic Asian Alone

Non-Hispanic Two Or More Races

Non-Hispanic American Indian & Alaska Native Alone

Non-Hispanic Native Hawaiian & Pac. Islander Alone

O'Fallon city, Illinois Citizen Voting-age Population By Race and Ethnicity in 2010

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Ethnicity	Voting-age Population	% of Voting-age Pop.
Non-Hispanic White Alone	15010	79.54
Non-Hispanic Black or African American Alone	2825	14.97
Hispanic or Latino of All Races	405	2.15
Non-Hispanic Asian Alone	345	1.83
Non-Hispanic Two Or More Races	255	1.35
Non-Hispanic American Indian and Alaska Native Alone	15	0.08
Non-Hispanic Native Hawaiian And Pacific Islander Alone	15	0.08