Demographics & People — Mount Clare, Illinois
Population Overview
| Population (Census) | 322 |
| Estimated 2026 | ~200 |
| Median Age | 59.5 |
| Total Households | 105 |
| Family Households | 59 |
| Average Household Size | 2.38 |
| Diversity Index | 0.0682 (relatively homogeneous) |
Race & Ethnicity
| White | 300 |
| Black or African American | 11 |
| Asian | 0 |
| Hispanic or Latino | 0 |
Heritage & Ancestry
| Group | Count |
| Unclassified or not reported | 138 |
| Italian | 66 |
| German | 59 |
| Irish | 42 |
| Other groups | 36 |
| English | 26 |
| Croatian | 5 |
| Czechoslovakian | 5 |
| Dutch | 5 |
| French (except Basque) | 5 |
Language
| English Only | 307 |
| Spanish | 0 |
| Population 5+ | 307 |
Veterans
| Veterans | 32 |
| Population 18+ | 276 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Mount Clare, Illinois.