Demographics & People — Olive Branch, Illinois
Population Overview
| Population (Census) | 441 |
| Estimated 2026 | ~700 |
| Median Age | 56.2 |
| Total Households | 183 |
| Family Households | 121 |
| Average Household Size | 2.41 |
| Diversity Index | 0.0 (relatively homogeneous) |
Race & Ethnicity
| White | 429 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 0 |
Heritage & Ancestry
| Group | Count |
| Unclassified or not reported | 367 |
| German | 127 |
| English | 59 |
| Irish | 25 |
| American | 16 |
| Other groups | 15 |
| European | 9 |
| Welsh | 5 |
| French (except Basque) | 5 |
Language
| English Only | 425 |
| Spanish | 0 |
| Population 5+ | 425 |
Veterans
| Veterans | 31 |
| Population 18+ | 432 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Olive Branch, Illinois.