Demographics & People — O'Fallon, Missouri
Population Overview
| Population (Census) | 92,697 |
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| Estimated 2026 | ~96,400 |
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| Median Age | 38.4 |
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| Total Households | 34,749 |
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| Family Households | 25,184 |
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| Average Household Size | 2.66 |
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| Diversity Index | 0.267 (somewhat diverse) |
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Race & Ethnicity
| White | 76,514 |
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| Black or African American | 4,735 |
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| Asian | 3,894 |
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| Hispanic or Latino | 4,682 |
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Heritage & Ancestry
| Group | Count |
|---|
| German | 27,376 |
| Unclassified or not reported | 22,676 |
| Other groups | 16,046 |
| Irish | 13,824 |
| English | 10,063 |
| Italian | 6,327 |
| American | 5,668 |
| Hispanic: Hispanic or Latino | 4,006 |
| French (except Basque) | 3,358 |
| Polish | 2,978 |
Language
| English Only | 81,054 |
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| Spanish | 1,976 |
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| Population 5+ | 86,840 |
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Veterans
| Veterans | 4,442 |
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| Population 18+ | 68,862 |
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Commuting
| Mean Commute Time | 25.5 minutes |
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| Work from Home | 18.1% |
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| Commuter Profile | N/A |
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Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for O'Fallon, Missouri.
