O'Fallon, Missouri Demographics & Population 2026
During the 2020–2024 ACS period, O'Fallon, Missouri had a total population of 93,801, the 7th largest city in Missouri, with a median household income of $110,443, which is 56% higher than the state average. The poverty rate is 5.4%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 56% above the state average — one of the wealthiest communities in Missouri.
- 43.3% of adults hold a bachelor's degree or higher — top 10% in Missouri.
O'Fallon Quick Facts
How O'Fallon Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 92,697 | 93,801 | +1.2% |
| Median household income | $107,203 | $110,443 | +3.0% |
| Median home value | $305,100 | $326,200 | +6.9% |
How O'Fallon Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 40 | National average: 61
Education
Educational Attainment (Adults 25+)
O'Fallon Rankings in Missouri
Explore Missouri Rankings
Other Cities in St. Charles County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| St. Charles | 71,508 | $85,937 | 7.3% | $298,700 |
| St. Peters | 59,092 | $91,637 | 5.7% | $269,900 |
| Wentzville | 47,061 | $112,394 | 5.4% | $331,300 |
| Lake St. Louis | 18,066 | $125,693 | 4.3% | $405,900 |
| Dardenne Prairie | 13,503 | $152,500 | 1.3% | $432,000 |
| Cottleville | 5,937 | $131,310 | 2.0% | $435,400 |
| Weldon Spring | 5,310 | $158,548 | 0.7% | $544,300 |
| St. Paul | 3,456 | $159,022 | 0.5% | $443,600 |
| Foristell | 1,096 | $116,581 | 1.7% | $431,700 |
| Josephville | 664 | $107,708 | 18.1% | $494,600 |
Cities Similar to O'Fallon
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Lee's Summit | 103,656 | $102,531 | $340,900 | 48.8% | 5.7% |
| St. Charles | 71,508 | $85,937 | $298,700 | 43.3% | 7.3% |
| St. Peters | 59,092 | $91,637 | $269,900 | 39.2% | 5.7% |
| Blue Springs | 59,965 | $88,920 | $263,100 | 35.0% | 7.0% |
| Independence | 121,740 | $60,339 | $172,900 | 21.9% | 15.8% |
Population Overview
O'Fallon is a mid-sized community located in Missouri, within St. Charles County. The total population is 93,801. It ranks as the 7th most populous out of 1,062 Census-designated places in Missouri.
Age Demographics
The median age in O'Fallon is 38.4 years. This is 2% lower than the state median of 39.0 years.
Economy, Income & Housing
The median household income in O'Fallon is $110,443. This is 56% higher than the state median of $70,702. It is also 37% higher than the national median of $80,734. The poverty rate stands at 5.4%. This is 57% lower than the state poverty rate of 12.6%. The unemployment rate is 2.7%. This is 33% lower than the state rate of 4.0%. The median home value is $326,200. Housing costs are 42% higher than the state median of $230,300. The home-value-to-income ratio is 3.0x. 81.0% of occupied housing units are owner-occupied. This homeownership rate is 19% higher than the state average of 68.1%.
Race & Ethnicity
The largest racial or ethnic group in O'Fallon is White (non-Hispanic), making up 79.5% of the population. Hispanic or Latino residents account for 5.5%. The Black or African American population (5.2%) is well below the state average of 10.9%. The Asian population is significantly higher than the state average (4.8% vs 2.1%).
Education
43.3% of residents aged 25 and older hold a bachelor's degree or higher. This places O'Fallon in the top 10% of all cities in the state for educational attainment. This is 34% higher than the state rate of 32.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.4%. Notably, 15.6% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for O'Fallon, Missouri is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Missouri state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,062 Census-designated places in Missouri. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of O'Fallon, Missouri?
O'Fallon, Missouri has a population of 93,801 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in O'Fallon, MO?
The median household income in O'Fallon is $110,443, which is 37% higher than the national median of $80,734.
What is the poverty rate in O'Fallon, MO?
The poverty rate in O'Fallon is 5.4%. This means approximately 5,015 residents live below the federal poverty line.
What is the racial makeup of O'Fallon, Missouri?
O'Fallon's population is 79.5% White, 5.2% Black, 5.5% Hispanic/Latino, and 4.8% Asian.
What is the median home value in O'Fallon, MO?
The median home value in O'Fallon is $326,200. The home-value-to-income ratio is 3.0x.
How educated is O'Fallon, Missouri?
43.3% of adults (25+) in O'Fallon hold a bachelor's degree or higher, and 15.6% hold a graduate or professional degree.