Census Dots

O'Fallon, MO Demographics

A map of O'Fallon's Population by Race

Race
PopulationPercent
White
74,34081.4%
Multiracial
4,5865.0%
Black
4,5685.0%
Asian
3,6884.0%
Hispanic
3,6394.0%
Native American/Other
4950.5%

O'Fallon, Missouri had a population of 91,316 in 2020. It was 81.4% White, 5.0% Black, 4.0% Asian, 4.0% Hispanic, 0.5% Native American/Other, and 5.0% 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 1,082 places in Missouri, O'Fallon is the 7th 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

74,340 residents of O'Fallon identify as White, or 81.4%. This makes the White share of the population of O'Fallon slightly larger than the White share of the population of Missouri (75.8% White). Of the 1,082 places in Missouri, O'Fallon is ranked #870 in terms of White residents as a share of the population.

O'Fallon is less White than neighboring Dardenne Prairie (85% White), St. Paul (91.4% White), Cottleville (83.6% White), Lake St. Louis (85% White), and Josephville (92.8% White).

O'Fallon's Black Population

4,568 residents of O'Fallon identify as Black, or 5.0%. This makes the Black share of the population of O'Fallon slightly less than the Black share of the population of Missouri (11.3% Black). Of the 1,082 places in Missouri, O'Fallon is ranked #159 in terms of Black residents as a share of the population.

O'Fallon is more Black than neighboring Dardenne Prairie (3.6% Black), St. Paul (1.6% Black), Cottleville (4.4% Black), Lake St. Louis (4.3% Black), and Josephville (2% Black).

O'Fallon's Asian Population

3,688 residents of O'Fallon identify as Asian, or 4.0%. This makes the Asian share of the population of O'Fallon roughly similar to the Asian share of the population of Missouri (2.1% Asian). Of the 1,082 places in Missouri, O'Fallon is ranked #36 in terms of Asian residents as a share of the population.

O'Fallon is more Asian than neighboring St. Paul (0.6% Asian), Lake St. Louis (2.4% Asian), and Josephville (1.2% Asian). O'Fallon is less Asian than neighboring Dardenne Prairie (4.4% Asian), and Cottleville (4.3% Asian).

O'Fallon's Hispanic Population

3,639 residents of O'Fallon identify as Hispanic, or 4.0%. This makes the Hispanic share of the population of O'Fallon roughly similar to the Hispanic share of the population of Missouri (4.9% Hispanic). Of the 1,082 places in Missouri, O'Fallon is ranked #246 in terms of Hispanic residents as a share of the population.

O'Fallon is more Hispanic than neighboring Dardenne Prairie (2.9% Hispanic), St. Paul (1.8% Hispanic), Cottleville (2.9% Hispanic), Lake St. Louis (3.2% Hispanic), and Josephville (1.8% Hispanic).

O'Fallon's Native American/Other Population

495 residents of O'Fallon identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.5%. 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 Missouri (0.9% Native American/Other). Of the 1,082 places in Missouri, O'Fallon is ranked #570 in terms of Native American/Other residents as a share of the population.

O'Fallon is more Native American/Other than neighboring Dardenne Prairie (0.3% Native American/Other), and Josephville (0.4% Native American/Other). O'Fallon is less Native American/Other than neighboring St. Paul (0.6% Native American/Other), and Lake St. Louis (0.6% Native American/Other).

O'Fallon's Multiracial Population

4,586 residents of O'Fallon identify as Multiracial, or 5.0%. This makes the Multiracial share of the population of O'Fallon roughly similar to the Multiracial share of the population of Missouri (5% Multiracial). Of the 1,082 places in Missouri, O'Fallon is ranked #469 in terms of Multiracial residents as a share of the population.

O'Fallon is more Multiracial than neighboring Dardenne Prairie (3.7% Multiracial), St. Paul (3.9% Multiracial), Cottleville (4.3% Multiracial), Lake St. Louis (4.5% Multiracial), and Josephville (2% Multiracial).

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