Demographics & People — Fairmont City, Illinois
Population Overview
| Population (Census) | 2,354 |
| Estimated 2026 | ~2,800 |
| Median Age | 38.9 |
| Total Households | 880 |
| Family Households | 528 |
| Average Household Size | 2.68 |
| Diversity Index | 0.4669 (moderately diverse) |
Race & Ethnicity
| White | 767 |
| Black or African American | 49 |
| Asian | 29 |
| Hispanic or Latino | 1,657 |
Heritage & Ancestry
| Group | Count |
| Hispanic: Hispanic or Latino | 1,389 |
| Hispanic: Mexican | 1,345 |
| Other groups | 1,289 |
| Unclassified or not reported | 707 |
| German | 99 |
| Irish | 52 |
| French (except Basque) | 48 |
| Canadian | 40 |
| English | 39 |
| Hispanic: Other Hispanic or Latino | 31 |
Language
| English Only | 1,062 |
| Spanish | 1,169 |
| Population 5+ | 2,231 |
Veterans
| Veterans | 126 |
| Population 18+ | 1,712 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Fairmont City, Illinois.