Demographics & People — Lewistown, Montana
Population Overview
| Population (Census) | 6,028 |
| Estimated 2026 | ~6,200 |
| Median Age | 44.7 |
| Total Households | 2,823 |
| Family Households | 1,448 |
| Average Household Size | 2.05 |
| Diversity Index | 0.1103 (relatively homogeneous) |
Race & Ethnicity
| White | 5,543 |
| Black or African American | 65 |
| Asian | 51 |
| Hispanic or Latino | 223 |
Heritage & Ancestry
| Group | Count |
| German | 1,530 |
| Unclassified or not reported | 1,285 |
| English | 748 |
| Irish | 692 |
| Other groups | 610 |
| American | 558 |
| Norwegian | 423 |
| Scottish | 209 |
| Czech | 186 |
| Hispanic: Mexican | 141 |
Language
| English Only | 5,525 |
| Spanish | 226 |
| Population 5+ | 5,785 |
Veterans
| Veterans | 760 |
| Population 18+ | 4,752 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Lewistown, Montana.