Demographics & People — Olean, Missouri
Population Overview
| Population (Census) | 265 |
| Estimated 2026 | ~100 |
| Median Age | 26.9 |
| Total Households | 68 |
| Family Households | 56 |
| Average Household Size | 3.9 |
| Diversity Index | 0.0 (relatively homogeneous) |
Race & Ethnicity
| White | 263 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 0 |
Heritage & Ancestry
| Group | Count |
| Other groups | 37 |
| American | 28 |
| Unclassified or not reported | 27 |
| Irish | 7 |
| German | 4 |
| Polish | 4 |
| English | 3 |
| Northern European | 3 |
| Italian | 2 |
| French (except Basque) | 2 |
Language
| English Only | 198 |
| Spanish | 0 |
| Population 5+ | 198 |
Veterans
| Veterans | 0 |
| Population 18+ | 86 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013 (county fallback). Data for Olean, Missouri.