Demographics & People — Alton, Illinois
Population Overview
| Population (Census) | 25,430 |
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| Estimated 2026 | ~24,900 |
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| Median Age | 38.0 |
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| Total Households | 10,811 |
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| Family Households | 5,696 |
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| Average Household Size | 2.3 |
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| Diversity Index | 0.4374 (moderately diverse) |
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Race & Ethnicity
| White | 16,961 |
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| Black or African American | 6,144 |
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| Asian | 289 |
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| Hispanic or Latino | 676 |
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Heritage & Ancestry
| Group | Count |
|---|
| Other groups | 8,914 |
| Unclassified or not reported | 6,140 |
| German | 5,036 |
| Irish | 3,224 |
| English | 2,234 |
| American | 1,047 |
| Italian | 830 |
| Hispanic: Hispanic or Latino | 635 |
| Polish | 509 |
| Hispanic: Mexican | 507 |
Language
| English Only | 23,047 |
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| Spanish | 290 |
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| Population 5+ | 23,925 |
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Veterans
| Veterans | 1,804 |
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| Population 18+ | 19,600 |
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Commuting
| Mean Commute Time | 22.7 minutes |
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| Work from Home | 9.7% |
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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 Alton, Illinois.
