Demographics & People — Mountain Plains, South Dakota
Population Overview
| Population (Census) | 412 |
|---|
| Estimated 2026 | ~200 |
|---|
| Median Age | 63.4 |
|---|
| Total Households | 168 |
|---|
| Family Households | 168 |
|---|
| Average Household Size | 2.45 |
|---|
| Diversity Index | N/A (N/A) |
|---|
Race & Ethnicity
| White | 368 |
|---|
| Black or African American | 0 |
|---|
| Asian | 18 |
|---|
| Hispanic or Latino | 3 |
|---|
Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 188 |
| German | 110 |
| Other groups | 80 |
| French (except Basque) | 67 |
| Irish | 66 |
| English | 40 |
| Norwegian | 39 |
| Finnish | 23 |
| Northern European | 13 |
| Danish | 3 |
Language
| English Only | 412 |
|---|
| Spanish | 0 |
|---|
| Population 5+ | 412 |
|---|
Veterans
| Veterans | 28 |
|---|
| Population 18+ | 444 |
|---|
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Mountain Plains, South Dakota.
