Demographics & People — Alpena, South Dakota
Population Overview
| Population (Census) | 349 |
| Estimated 2026 | ~300 |
| Median Age | 35.3 |
| Total Households | 150 |
| Family Households | 107 |
| Average Household Size | 2.33 |
| Diversity Index | N/A (N/A) |
Race & Ethnicity
| White | 232 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 119 |
Heritage & Ancestry
| Group | Count |
| Hispanic: Hispanic or Latino | 119 |
| American | 113 |
| Other groups | 108 |
| Hispanic: Central American | 104 |
| Hispanic: Guatemalan | 104 |
| German | 101 |
| Norwegian | 47 |
| Irish | 33 |
| English | 29 |
| French (except Basque) | 27 |
Language
| English Only | 268 |
| Spanish | 42 |
| Population 5+ | 333 |
Veterans
| Veterans | 29 |
| Population 18+ | 285 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Alpena, South Dakota.