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> South Dakota > Zip Code 57551
| Zip Code : | 57551 |
| City : | Martin city |
| County : | Bennett County |
| State : | South Dakota (SD) |
| Land Area : | 726.06 sq mi |
| Water Area : | 4.60 sq mi |
| Latitude : | 43.1754340 |
| Longitude : | -101.7020790 |
| Population (2010): | 2,279 |
| Population Estimate (2012) : | 1,981 |
| Population Density : | 3.14/sq mi |
| Housing Units (2012) : | 926 |
| Median Household Income (2012) : | $38,036 (South Dakota : $49,091, USA : $53,046) |
| Median Family Income (2012) : | $48,000 (South Dakota : $62,967, USA : $64,585) |
| Median House Price (2012) : | $60,400 (South Dakota : $129,800, USA : $181,400) |