Demographics & People — Osco, Illinois
Population Overview
| Population (Census) | 63 |
| Estimated 2026 | ~100 |
| Median Age | 64.2 |
| Total Households | 21 |
| Family Households | 21 |
| Average Household Size | 3.0 |
| Diversity Index | 0.0 (relatively homogeneous) |
Race & Ethnicity
| White | 63 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 0 |
Heritage & Ancestry
| Group | Count |
| Swedish | 38 |
| Unclassified or not reported | 30 |
| English | 27 |
| French (except Basque) | 14 |
| Irish | 10 |
| Dutch | 10 |
| Other groups | 9 |
Language
| English Only | 63 |
| Spanish | 0 |
| Population 5+ | 63 |
Veterans
| Veterans | 8 |
| Population 18+ | 109 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013 (county fallback). Data for Osco, Illinois.