Demographics in O'Fallon, IL

Population, age, race, ethnicity, and household statistics — 2023 ACS Data

Where is O'Fallon?

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Population

Source: U.S. Census Bureau ACS (2023)

Total Population

32,139

Male

15,864

49.4%

Female

16,275

50.6%

Median Age

36.9

Age Distribution

Source: U.S. Census Bureau ACS (2023)

Race & Ethnicity

Source: U.S. Census Bureau ACS (2023)

White

72.6%

Black

13.6%

Hispanic

6.0%

Asian

2.9%

Two or More

9.3%

Other

1.5%

Education & Household

Source: U.S. Census Bureau ACS (2023)

Bachelor's or Higher

33.8%

High School or Higher

43.5%

Foreign Born

4.2%

Veterans

13.4%

Married

47.2%

Avg Household Size

2.6

Marital Status by Age

Source: U.S. Census Bureau ACS (2023)

O'Fallon, IL has a population of 32,139 with a median age of 36.9. The racial makeup is 72.6% White, 6.0% Hispanic, 13.6% Black, 2.9% Asian. About 33.8% of residents hold a bachelor's degree or higher. The foreign-born population is 4.2%.