| Population | 1 (2010), see rank |
| House Units | 3, see rank |
| Race | Whites:0%, Hispanics:0%, Blacks:0%, Asians:0%, Others:100% |
| Total Area: | 5.95 sq mi |
| Water Area: | 0.02 sq mi (0.39%) |
| State: | South Dakota |
| County: | Buffalo County |
| City: | Gann Valley |
| Census Tract: | 940200 |
| Census Block Group: | 940200-2 |