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> South Dakota > Zip Code 57640
| Zip Code : | 57640 |
| City : | |
| County : | Perkins County |
| State : | South Dakota (SD) |
| Land Area : | 398.68 sq mi |
| Water Area : | 0.75 sq mi |
| Latitude : | 45.7895984 |
| Longitude : | -102.7176203 |
| Population (2010): | 176 |
| Population Estimate (2012) : | 220 |
| Population Density : | 0.44/sq mi |
| Housing Units (2012) : | 112 |
| Median Household Income (2012) : | $49,306 (South Dakota : $49,091, USA : $53,046) |
| Median Family Income (2012) : | $50,069 (South Dakota : $62,967, USA : $64,585) |
| Median House Price (2012) : | $59,500 (South Dakota : $129,800, USA : $181,400) |