Demographics & People — Arnold, Missouri
Population Overview
| Population (Census) | 20,884 |
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| Estimated 2026 | ~21,100 |
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| Median Age | 39.7 |
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| Total Households | 8,533 |
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| Family Households | 5,661 |
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| Average Household Size | 2.43 |
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| Diversity Index | 0.071 (relatively homogeneous) |
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Race & Ethnicity
| White | 18,984 |
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| Black or African American | 42 |
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| Asian | 218 |
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| Hispanic or Latino | 459 |
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Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 6,596 |
| German | 5,883 |
| Irish | 2,499 |
| Other groups | 2,332 |
| English | 1,814 |
| American | 1,505 |
| Italian | 1,037 |
| French (except Basque) | 905 |
| Yugoslavian | 634 |
| European | 545 |
Language
| English Only | 18,136 |
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| Spanish | 185 |
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| Population 5+ | 19,554 |
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Veterans
| Veterans | 1,218 |
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| Population 18+ | 16,378 |
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Commuting
| Mean Commute Time | 27.2 minutes |
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| Work from Home | 8.1% |
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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 Arnold, Missouri.
