Demographics & People — Martinsville, Illinois
Population Overview
| Population (Census) | 1,212 |
| Estimated 2026 | ~1,100 |
| Median Age | 50.1 |
| Total Households | 542 |
| Family Households | 337 |
| Average Household Size | 2.24 |
| Diversity Index | 0.0502 (relatively homogeneous) |
Race & Ethnicity
| White | 1,180 |
| Black or African American | 0 |
| Asian | 9 |
| Hispanic or Latino | 22 |
Heritage & Ancestry
| Group | Count |
| Unclassified or not reported | 531 |
| German | 256 |
| English | 245 |
| Other groups | 224 |
| Irish | 99 |
| American | 93 |
| French (except Basque) | 32 |
| European | 26 |
| Dutch | 20 |
| Polish | 19 |
Language
| English Only | 1,170 |
| Spanish | 7 |
| Population 5+ | 1,186 |
Veterans
| Veterans | 79 |
| Population 18+ | 1,090 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Martinsville, Illinois.