Demographics & People — Eureka, Illinois
Population Overview
| Population (Census) | 5,095 |
| Estimated 2026 | ~4,800 |
| Median Age | 42.2 |
| Total Households | 2,148 |
| Family Households | 1,202 |
| Average Household Size | 2.11 |
| Diversity Index | 0.0862 (relatively homogeneous) |
Race & Ethnicity
| White | 4,742 |
| Black or African American | 96 |
| Asian | 11 |
| Hispanic or Latino | 114 |
Heritage & Ancestry
| Group | Count |
| German | 1,951 |
| Unclassified or not reported | 1,712 |
| Irish | 717 |
| English | 492 |
| Other groups | 385 |
| European | 292 |
| American | 245 |
| Hispanic: Hispanic or Latino | 225 |
| Hispanic: Mexican | 189 |
| French (except Basque) | 151 |
Language
| English Only | 4,727 |
| Spanish | 70 |
| Population 5+ | 4,826 |
Veterans
| Veterans | 172 |
| Population 18+ | 4,519 |
Commuting
| Mean Commute Time | 31.7 minutes |
| Work from Home | 12.4% |
| Commuter Profile | N/A |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Eureka, Illinois.