Demographics & People — Altamont, Illinois
Population Overview
| Population (Census) | 2,500 |
| Estimated 2026 | ~1,800 |
| Median Age | 38.9 |
| Total Households | 994 |
| Family Households | 646 |
| Average Household Size | 2.44 |
| Diversity Index | 0.0338 (relatively homogeneous) |
Race & Ethnicity
| White | 2,411 |
| Black or African American | 26 |
| Asian | 0 |
| Hispanic or Latino | 16 |
Heritage & Ancestry
| Group | Count |
| German | 968 |
| Unclassified or not reported | 626 |
| Other groups | 256 |
| Irish | 176 |
| American | 165 |
| French (except Basque) | 156 |
| English | 130 |
| Italian | 42 |
| Dutch | 40 |
| Polish | 21 |
Language
| English Only | 2,390 |
| Spanish | 16 |
| Population 5+ | 2,413 |
Veterans
| Veterans | 202 |
| Population 18+ | 1,828 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Altamont, Illinois.