Demographics & People — Decatur, Illinois
Population Overview
| Population (Census) | 70,368 |
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| Estimated 2026 | ~68,500 |
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| Median Age | 39.2 |
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| Total Households | 30,904 |
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| Family Households | 15,920 |
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| Average Household Size | 2.18 |
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| Diversity Index | 0.4439 (moderately diverse) |
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Race & Ethnicity
| White | 47,281 |
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| Black or African American | 16,941 |
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| Asian | 966 |
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| Hispanic or Latino | 2,241 |
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Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 21,239 |
| Other groups | 21,154 |
| German | 12,407 |
| Irish | 7,370 |
| English | 6,570 |
| American | 4,635 |
| Hispanic: Hispanic or Latino | 2,109 |
| Hispanic: Mexican | 1,332 |
| French (except Basque) | 1,269 |
| Italian | 1,234 |
Language
| English Only | 62,974 |
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| Spanish | 1,462 |
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| Population 5+ | 66,056 |
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Veterans
| Veterans | 4,298 |
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| Population 18+ | 56,066 |
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Commuting
| Mean Commute Time | 17.7 minutes |
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| Work from Home | 8.4% |
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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 Decatur, Illinois.
