Demographics & People — Letcher, South Dakota
Population Overview
| Population (Census) | 184 |
| Estimated 2026 | ~100 |
| Median Age | 38.4 |
| Total Households | 72 |
| Family Households | 35 |
| Average Household Size | 2.56 |
| Diversity Index | N/A (N/A) |
Race & Ethnicity
| White | 158 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 10 |
Heritage & Ancestry
| Group | Count |
| German | 85 |
| Unclassified or not reported | 25 |
| Other groups | 24 |
| Norwegian | 12 |
| Welsh | 9 |
| Dutch | 9 |
| Irish | 7 |
| Czech | 6 |
| American | 3 |
| Belgian | 2 |
Language
| English Only | 175 |
| Spanish | 1 |
| Population 5+ | 176 |
Veterans
| Veterans | 5 |
| Population 18+ | 103 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Letcher, South Dakota.