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> South Dakota > Zip Code 57042
| Zip Code : | 57042 |
| City : | Lake Madison, Madison city |
| County : | Lake County |
| State : | South Dakota (SD) |
| Land Area : | 205.20 sq mi |
| Water Area : | 4.28 sq mi |
| Latitude : | 43.9865865 |
| Longitude : | -97.1566814 |
| Population (2010): | 8,415 |
| Population Estimate (2012) : | 8,609 |
| Population Density : | 41.01/sq mi |
| Housing Units (2012) : | 3,845 |
| Median Household Income (2012) : | $41,345 (South Dakota : $49,091, USA : $53,046) |
| Median Family Income (2012) : | $66,090 (South Dakota : $62,967, USA : $64,585) |
| Median House Price (2012) : | $104,500 (South Dakota : $129,800, USA : $181,400) |