| Population | 10 (2010), see rank |
| House Units | 3, see rank |
| Race | Whites:100%, Hispanics:0%, Blacks:0%, Asians:0%, Others:0% |
| Total Area: | 19.57 sq mi |
| Water Area: | 0.02 sq mi (0.13%) |
| State: | South Dakota |
| County: | Buffalo County |
| City: | Gann Valley |
| Census Tract: | 940200 |
| Census Block Group: | 940200-2 |