O'Fallon, MO Census Data
The 7th largest city in Missouri by population · 13 cities ranked
O'Fallon is the 7th largest city in Missouri by population and ranks 1st of 13 for median household income. With 92,697 residents, it has a lower poverty rate than 12 other Missouri cities. This snapshot draws from the 2023 American Community Survey (ACS) 5-year estimates.
Updated: 2026-04-13 · Source: U.S. Census Bureau, ACS 2023
Population
92,697
49.2% male · 50.8% female
Median Age
38.2
0.5 below the national average (38.7 yrs)
Median Household Income
$107,203
$28,665 above the national average ($78,538)
Bachelor's Degree or Higher
42.4%
7.4% above the national average (35.0%)
HS diploma or higher: 95.5%
Poverty Rate
4.7%
7.7% below the national average (12.4%)
Uninsured: 4.0%
Broadband Access
97.1%
7.4% above the national average (89.7%)
Median Home Value
$305,100
Median rent: $1,400 · 80% owner-occupied
Unemployment Rate
2.7%
Labor force participation: 70.8%
Per Capita Income
$56,352
Individual average income (not household)
Veteran Population
6.2%
Disability rate: 10.1%
How O'Fallon Compares to Other Missouri Cities
Rankings among all 13 Missouri cities tracked in the 2023 ACS.
| Ranking | Position | Tier |
|---|---|---|
| Largest by Population | 7th of 13 | Bottom half |
| Highest Median Income | 1st of 13 | Top 10% |
| Lowest Poverty Rate | 1st of 13 | Top 10% |
| Highest Bachelor's Attainment | 4th of 13 | Top half |
| Highest Home Value | 2nd of 13 | Top 25% |
Demographics
Race & Ethnicity
Age Distribution
Commute to Work
O'Fallon, MO Frequently Asked Questions
What is the population of O'Fallon, MO?
The population of O'Fallon, MO is 92,697 according to the 2023 American Community Survey 5-year estimates. The median age is 38.2 years.
What is the median household income in O'Fallon?
The median household income in O'Fallon, MO is $107,203, above the national average of $78,538. Per capita income is $56,352.
What is the poverty rate in O'Fallon?
The poverty rate in O'Fallon, MO is 4.7%, compared to the national average of 12.4%. About 4.0% of residents lack health insurance.
What percentage of O'Fallon residents have a college degree?
42.4% of adults (25+) in O'Fallon hold a bachelor's degree or higher, and 95.5% have at least a high school diploma. The national average for bachelor's degree holders is 35.0%.
What is the median home value in O'Fallon?
The median home value in O'Fallon, MO is $305,100. Median rent is $1,400 per month, with 80% of housing units owner-occupied.
What is the racial makeup of O'Fallon?
O'Fallon's population is 82.5% White, 5.1% Black, 5.1% Hispanic or Latino, and 4.2% Asian (source: 2023 ACS).
How does O'Fallon rank among Missouri cities?
O'Fallon is the 7th largest city in Missouri by population, the 1st highest for median household income, the 1st lowest for poverty rate, the 4th highest for bachelor's degree attainment among 13 ranked Missouri cities.
What is the unemployment rate in O'Fallon?
The unemployment rate in O'Fallon, MO is 2.7%, with a labor force participation rate of 70.8%. Per capita income is $56,352.
Cities Similar to O'Fallon
Other Missouri cities with comparable population and income levels.