Demographics & People — Marseilles, Illinois
Population Overview
| Population (Census) | 4,071 |
| Estimated 2026 | ~4,800 |
| Median Age | 41.4 |
| Total Households | 1,703 |
| Family Households | 994 |
| Average Household Size | 2.35 |
| Diversity Index | 0.1582 (relatively homogeneous) |
Race & Ethnicity
| White | 3,741 |
| Black or African American | 0 |
| Asian | 121 |
| Hispanic or Latino | 225 |
Heritage & Ancestry
| Group | Count |
| Unclassified or not reported | 858 |
| German | 851 |
| Irish | 806 |
| Other groups | 702 |
| English | 539 |
| Italian | 437 |
| French (except Basque) | 368 |
| Norwegian | 272 |
| Hispanic: Hispanic or Latino | 243 |
| Hispanic: Mexican | 212 |
Language
| English Only | 3,625 |
| Spanish | 39 |
| Population 5+ | 3,860 |
Veterans
| Veterans | 362 |
| Population 18+ | 3,117 |
Commuting
| Mean Commute Time | 30.7 minutes |
| Work from Home | 10.4% |
| 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 Marseilles, Illinois.