Demographics & People — Willow Hill, Illinois
Population Overview
| Population (Census) | 266 |
| Estimated 2026 | ~400 |
| Median Age | 27.4 |
| Total Households | 87 |
| Family Households | 54 |
| Average Household Size | 3.06 |
| Diversity Index | 0.0224 (relatively homogeneous) |
Race & Ethnicity
| White | 262 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 3 |
Heritage & Ancestry
| Group | Count |
| German | 138 |
| Irish | 120 |
| Unclassified or not reported | 86 |
| Other groups | 16 |
| American | 13 |
| English | 7 |
| Welsh | 2 |
| Scandinavian | 1 |
Language
| English Only | 232 |
| Spanish | 7 |
| Population 5+ | 240 |
Veterans
| Veterans | 3 |
| Population 18+ | 156 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Willow Hill, Illinois.