Demographics & People — Jefferson, New York
Population Overview
| Population (Census) | 150 |
| Estimated 2026 | ~300 |
| Median Age | 32.9 |
| Total Households | 63 |
| Family Households | 53 |
| Average Household Size | 2.38 |
| Diversity Index | N/A (N/A) |
Race & Ethnicity
| White | 84 |
| Black or African American | 0 |
| Asian | 6 |
| Hispanic or Latino | 15 |
Heritage & Ancestry
| Group | Count |
| Unclassified or not reported | 80 |
| German | 33 |
| Welsh | 29 |
| Irish | 10 |
| Other groups | 10 |
| English | 9 |
| Ukrainian | 8 |
| Italian | 7 |
| American | 2 |
| Swiss | 2 |
Language
| English Only | 85 |
| Spanish | 0 |
| Population 5+ | 131 |
Veterans
| Veterans | 0 |
| Population 18+ | 95 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Jefferson, New York.