Demographics & People — Oacoma, South Dakota
Population Overview
| Population (Census) | 505 |
| Estimated 2026 | ~700 |
| Median Age | 40.2 |
| Total Households | 221 |
| Family Households | 124 |
| Average Household Size | 2.29 |
| Diversity Index | N/A (N/A) |
Race & Ethnicity
| White | 484 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 14 |
Heritage & Ancestry
| Group | Count |
| German | 119 |
| Unclassified or not reported | 95 |
| Irish | 61 |
| Other groups | 51 |
| American | 48 |
| Norwegian | 28 |
| English | 26 |
| Hispanic: Hispanic or Latino | 16 |
| Hispanic: Central American | 16 |
| Hispanic: Honduran | 16 |
Language
| English Only | 453 |
| Spanish | 13 |
| Population 5+ | 466 |
Veterans
| Veterans | 39 |
| Population 18+ | 330 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Oacoma, South Dakota.