Census Dots

O'Fallon, IL Demographics

A map of O'Fallon's Population by Race

Race
PopulationPercent
White
22,34469.2%
Black
5,20016.1%
Multiracial
2,0116.2%
Hispanic
1,6295.0%
Asian
8732.7%
Native American/Other
2320.7%

O'Fallon, Illinois had a population of 32,289 in 2020. It was 69.2% White, 16.1% Black, 2.7% Asian, 5.0% Hispanic, 0.7% Native American/Other, and 6.2% Multiracial. This map presents the population of O'Fallon, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Of the 1,466 places in Illinois, O'Fallon is the 59th most populous. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs).

O'Fallon's White Population

22,344 residents of O'Fallon identify as White, or 69.2%. This makes the White share of the population of O'Fallon slightly larger than the White share of the population of Illinois (58.3% White). Of the 1,466 places in Illinois, O'Fallon is ranked #1241 in terms of White residents as a share of the population.

O'Fallon is more White than neighboring Shiloh (60.2% White), Scott AFB (61.7% White), Swansea (64.5% White), and Fairview Heights (54.7% White). O'Fallon is less White than neighboring Lebanon (73.3% White).

O'Fallon's Black Population

5,200 residents of O'Fallon identify as Black, or 16.1%. This makes the Black share of the population of O'Fallon roughly similar to the Black share of the population of Illinois (13.9% Black). Of the 1,466 places in Illinois, O'Fallon is ranked #104 in terms of Black residents as a share of the population.

O'Fallon is more Black than neighboring Scott AFB (12.4% Black), and Lebanon (15.5% Black). O'Fallon is less Black than neighboring Shiloh (25.3% Black), Swansea (22.7% Black), and Fairview Heights (31.2% Black).

O'Fallon's Asian Population

873 residents of O'Fallon identify as Asian, or 2.7%. This makes the Asian share of the population of O'Fallon roughly similar to the Asian share of the population of Illinois (5.8% Asian). Of the 1,466 places in Illinois, O'Fallon is ranked #190 in terms of Asian residents as a share of the population.

O'Fallon is more Asian than neighboring Lebanon (1.3% Asian). O'Fallon is less Asian than neighboring Shiloh (2.8% Asian), Scott AFB (4% Asian), and Fairview Heights (2.9% Asian).

O'Fallon's Hispanic Population

1,629 residents of O'Fallon identify as Hispanic, or 5.0%. This makes the Hispanic share of the population of O'Fallon less than the Hispanic share of the population of Illinois (18.2% Hispanic). Of the 1,466 places in Illinois, O'Fallon is ranked #494 in terms of Hispanic residents as a share of the population.

O'Fallon is more Hispanic than neighboring Swansea (4.1% Hispanic), Fairview Heights (4.4% Hispanic), and Lebanon (4.2% Hispanic). O'Fallon is less Hispanic than neighboring Scott AFB (12.2% Hispanic).

O'Fallon's Native American/Other Population

232 residents of O'Fallon identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.7%. This makes the Native American/Other share of the population of O'Fallon roughly similar to the Native American/Other share of the population of Illinois (0.5% Native American/Other). Of the 1,466 places in Illinois, O'Fallon is ranked #239 in terms of Native American/Other residents as a share of the population.

O'Fallon is more Native American/Other than neighboring Lebanon (0.6% Native American/Other). O'Fallon is less Native American/Other than neighboring Shiloh (0.8% Native American/Other), Scott AFB (1.4% Native American/Other), Swansea (0.9% Native American/Other), and Fairview Heights (0.8% Native American/Other).

O'Fallon's Multiracial Population

2,011 residents of O'Fallon identify as Multiracial, or 6.2%. This makes the Multiracial share of the population of O'Fallon roughly similar to the Multiracial share of the population of Illinois (3.2% Multiracial). Of the 1,466 places in Illinois, O'Fallon is ranked #109 in terms of Multiracial residents as a share of the population.

O'Fallon is more Multiracial than neighboring Shiloh (5.8% Multiracial), Swansea (5.1% Multiracial), Fairview Heights (6% Multiracial), and Lebanon (5.2% Multiracial). O'Fallon is less Multiracial than neighboring Scott AFB (8.2% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.