Demographics & People — Chillicothe, Illinois
Population Overview
| Population (Census) | 6,185 |
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| Estimated 2026 | ~5,300 |
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| Median Age | 51.2 |
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| Total Households | 2,842 |
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| Family Households | 1,566 |
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| Average Household Size | 2.13 |
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| Diversity Index | 0.1095 (relatively homogeneous) |
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Race & Ethnicity
| White | 5,335 |
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| Black or African American | 107 |
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| Asian | 32 |
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| Hispanic or Latino | 184 |
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Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 1,985 |
| German | 1,300 |
| Other groups | 1,031 |
| English | 1,006 |
| Irish | 661 |
| American | 323 |
| Italian | 236 |
| Hispanic: Mexican | 194 |
| Hispanic: Hispanic or Latino | 194 |
| Swedish | 191 |
Language
| English Only | 5,690 |
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| Spanish | 19 |
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| Population 5+ | 5,717 |
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Veterans
| Veterans | 389 |
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| Population 18+ | 4,722 |
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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 Chillicothe, Illinois.
