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> South Dakota > Zip Code 57646
| Zip Code : | 57646 |
| City : | Mound City town |
| County : | Campbell County |
| State : | South Dakota (SD) |
| Land Area : | 137.62 sq mi |
| Water Area : | 1.00 sq mi |
| Latitude : | 45.6824199 |
| Longitude : | -100.0816705 |
| Population (2010): | 199 |
| Population Estimate (2012) : | 188 |
| Population Density : | 1.45/sq mi |
| Housing Units (2012) : | 121 |
| Median Household Income (2012) : | $67,083 (South Dakota : $49,091, USA : $53,046) |
| Median Family Income (2012) : | $88,438 (South Dakota : $62,967, USA : $64,585) |
| Median House Price (2012) : | $33,300 (South Dakota : $129,800, USA : $181,400) |