Demographics & People — Marengo, Ohio
Population Overview
| Population (Census) | 240 |
| Estimated 2026 | ~200 |
| Median Age | 32.3 |
| Total Households | 112 |
| Family Households | 87 |
| Average Household Size | 2.14 |
| Diversity Index | 0.1116 (relatively homogeneous) |
Race & Ethnicity
| White | 222 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 14 |
Heritage & Ancestry
| Group | Count |
| Unclassified or not reported | 120 |
| Other groups | 79 |
| German | 55 |
| Polish | 30 |
| Italian | 19 |
| English | 17 |
| Hispanic: Mexican | 15 |
| Hispanic: Hispanic or Latino | 15 |
| Irish | 11 |
| European | 10 |
Language
| English Only | 211 |
| Spanish | 4 |
| Population 5+ | 217 |
Veterans
| Veterans | 11 |
| Population 18+ | 225 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Marengo, Ohio.