Demographics & People — Olivet, Illinois
Population Overview
| Population (Census) | 156 |
| Estimated 2026 | ~100 |
| Median Age | 43.3 |
| Total Households | 76 |
| Family Households | 25 |
| Average Household Size | 1.96 |
| Diversity Index | 0.3637 (somewhat diverse) |
Race & Ethnicity
| White | 115 |
| Black or African American | 1 |
| Asian | 1 |
| Hispanic or Latino | 33 |
Heritage & Ancestry
| Group | Count |
| Unclassified or not reported | 61 |
| Irish | 39 |
| English | 27 |
| European | 22 |
| Danish | 18 |
| American | 17 |
| German | 12 |
| French (except Basque) | 10 |
| Arab | 1 |
| Moroccan | 1 |
Language
| English Only | 133 |
| Spanish | 0 |
| Population 5+ | 133 |
Veterans
| Veterans | 12 |
| Population 18+ | 140 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013 (county fallback). Data for Olivet, Illinois.