Demographics & People — Marlboro, Ohio
Population Overview
| Population (Census) | 211 |
| Estimated 2026 | ~300 |
| Median Age | 65.0 |
| Total Households | 94 |
| Family Households | 70 |
| Average Household Size | 2.24 |
| Diversity Index | 0.0 (relatively homogeneous) |
Race & Ethnicity
| White | 207 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 0 |
Heritage & Ancestry
| Group | Count |
| German | 91 |
| Irish | 67 |
| Unclassified or not reported | 25 |
| European | 19 |
| Italian | 18 |
| English | 18 |
| American | 15 |
| Welsh | 15 |
| Dutch | 13 |
| Arab | 12 |
Language
| English Only | 205 |
| Spanish | 0 |
| Population 5+ | 211 |
Veterans
| Veterans | 13 |
| Population 18+ | 224 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Marlboro, Ohio.