Demographics & People — Jamestown, Washington
Population Overview
| Population (Census) | 409 |
| Estimated 2026 | ~300 |
| Median Age | 44.0 |
| Total Households | 186 |
| Family Households | 118 |
| Average Household Size | 2.2 |
| Diversity Index | 0.0 (relatively homogeneous) |
Race & Ethnicity
| White | 375 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 0 |
Heritage & Ancestry
| Group | Count |
| Irish | 113 |
| Other groups | 71 |
| French (except Basque) | 59 |
| German | 46 |
| Unclassified or not reported | 39 |
| American | 33 |
| Czech | 24 |
| Hungarian | 21 |
| English | 21 |
| Norwegian | 15 |
Language
| English Only | 409 |
| Spanish | 0 |
| Population 5+ | 409 |
Veterans
| Veterans | 30 |
| Population 18+ | 298 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Jamestown, Washington.