Demographics & People — St. Martin, Ohio
Population Overview
| Population (Census) | 133 |
| Estimated 2026 | ~300 |
| Median Age | 56.9 |
| Total Households | 63 |
| Family Households | 47 |
| Average Household Size | 2.11 |
| Diversity Index | 0.0 (relatively homogeneous) |
Race & Ethnicity
| White | 133 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 0 |
Heritage & Ancestry
| Group | Count |
| Unclassified or not reported | 44 |
| English | 39 |
| American | 33 |
| Irish | 19 |
| German | 16 |
Language
| English Only | 128 |
| Spanish | 0 |
| Population 5+ | 128 |
Veterans
| Veterans | 6 |
| Population 18+ | 121 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013 (county fallback). Data for St. Martin, Ohio.