Demographics & People — Sullivan, Illinois
Population Overview
| Population (Census) | 4,253 |
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| Estimated 2026 | ~4,600 |
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| Median Age | 38.1 |
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| Total Households | 1,780 |
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| Family Households | 1,138 |
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| Average Household Size | 2.27 |
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| Diversity Index | 0.0668 (relatively homogeneous) |
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Race & Ethnicity
| White | 4,060 |
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| Black or African American | 93 |
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| Asian | 13 |
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| Hispanic or Latino | 38 |
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Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 2,043 |
| German | 805 |
| English | 537 |
| Other groups | 431 |
| American | 412 |
| Irish | 347 |
| Italian | 106 |
| French (except Basque) | 70 |
| British | 68 |
| Hispanic: Hispanic or Latino | 52 |
Language
| English Only | 3,981 |
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| Spanish | 7 |
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| Population 5+ | 4,034 |
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Veterans
| Veterans | 291 |
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| Population 18+ | 3,310 |
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Commuting
| Mean Commute Time | 16.3 minutes |
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| Work from Home | 1.7% |
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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 Sullivan, Illinois.
