Demographics & People — San Jose, Illinois
Population Overview
| Population (Census) | 604 |
| Estimated 2026 | ~500 |
| Median Age | 34.0 |
| Total Households | 228 |
| Family Households | 162 |
| Average Household Size | 2.65 |
| Diversity Index | 0.0853 (relatively homogeneous) |
Race & Ethnicity
| White | 517 |
| Black or African American | 0 |
| Asian | 20 |
| Hispanic or Latino | 4 |
Heritage & Ancestry
| Group | Count |
| Unclassified or not reported | 222 |
| German | 125 |
| Other groups | 107 |
| Irish | 74 |
| American | 63 |
| English | 56 |
| French (except Basque) | 22 |
| Scottish | 18 |
| Swedish | 12 |
| Hispanic: Hispanic or Latino | 11 |
Language
| English Only | 550 |
| Spanish | 4 |
| Population 5+ | 555 |
Veterans
| Veterans | 28 |
| Population 18+ | 480 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for San Jose, Illinois.