Demographics & People — Lake St. Louis, Missouri
Population Overview
| Population (Census) | 17,538 |
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| Estimated 2026 | ~19,400 |
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| Median Age | 42.7 |
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| Total Households | 7,179 |
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| Family Households | 5,192 |
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| Average Household Size | 2.44 |
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| Diversity Index | 0.1676 (relatively homogeneous) |
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Race & Ethnicity
| White | 15,358 |
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| Black or African American | 744 |
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| Asian | 273 |
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| Hispanic or Latino | 489 |
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Heritage & Ancestry
| Group | Count |
|---|
| German | 4,973 |
| Irish | 3,207 |
| Unclassified or not reported | 2,826 |
| Other groups | 2,721 |
| English | 2,562 |
| American | 1,111 |
| Italian | 1,049 |
| Hispanic: Hispanic or Latino | 789 |
| French (except Basque) | 708 |
| Polish | 679 |
Language
| English Only | 16,159 |
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| Spanish | 346 |
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| Population 5+ | 16,970 |
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Veterans
| Veterans | 1,382 |
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| Population 18+ | 13,705 |
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Commuting
| Mean Commute Time | 25.6 minutes |
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| Work from Home | 21.9% |
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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 Lake St. Louis, Missouri.
