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> South Dakota > Zip Code 57312
| Zip Code : | 57312 |
| City : | Alpena town |
| County : | Jerauld County, Beadle County |
| State : | South Dakota (SD) |
| Land Area : | 106.11 sq mi |
| Water Area : | 0.53 sq mi |
| Latitude : | 44.2072366 |
| Longitude : | -98.3792490 |
| Population (2010): | 516 |
| Population Estimate (2012) : | 441 |
| Population Density : | 4.86/sq mi |
| Housing Units (2012) : | 236 |
| Median Household Income (2012) : | $46,250 (South Dakota : $49,091, USA : $53,046) |
| Median Family Income (2012) : | $46,250 (South Dakota : $62,967, USA : $64,585) |
| Median House Price (2012) : | $52,500 (South Dakota : $129,800, USA : $181,400) |