Demographics & People — Gillespie, Illinois
Population Overview
| Population (Census) | 3,118 |
|---|
| Estimated 2026 | ~2,200 |
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| Median Age | 45.3 |
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| Total Households | 1,282 |
|---|
| Family Households | 825 |
|---|
| Average Household Size | 2.43 |
|---|
| Diversity Index | 0.0189 (relatively homogeneous) |
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Race & Ethnicity
| White | 2,906 |
|---|
| Black or African American | 0 |
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| Asian | 0 |
|---|
| Hispanic or Latino | 28 |
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Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 1,047 |
| German | 933 |
| Irish | 524 |
| English | 330 |
| Italian | 286 |
| American | 214 |
| Other groups | 177 |
| Scottish | 165 |
| Scotch-Irish | 58 |
| Polish | 44 |
Language
| English Only | 2,841 |
|---|
| Spanish | 0 |
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| Population 5+ | 2,841 |
|---|
Veterans
| Veterans | 308 |
|---|
| Population 18+ | 2,435 |
|---|
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Gillespie, Illinois.
