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> South Dakota > Zip Code 57633
| Zip Code : | 57633 |
| City : | Green Grass, Isabel town |
| County : | Dewey County, Ziebach County, Corson County |
| State : | South Dakota (SD) |
| Land Area : | 752.88 sq mi |
| Water Area : | 2.87 sq mi |
| Latitude : | 45.4572106 |
| Longitude : | -101.4479900 |
| Population (2010): | 414 |
| Population Estimate (2012) : | 558 |
| Population Density : | 0.55/sq mi |
| Housing Units (2012) : | 199 |
| Median Household Income (2012) : | $57,500 (South Dakota : $49,091, USA : $53,046) |
| Median Family Income (2012) : | $68,750 (South Dakota : $62,967, USA : $64,585) |
| Median House Price (2012) : | $49,500 (South Dakota : $129,800, USA : $181,400) |