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> Pennsylvania > Zip Code 17057
| Zip Code : | 17057 |
| City : | Middletown borough, Royalton borough |
| County : | Dauphin County |
| State : | Pennsylvania (PA) |
| Land Area : | 32.31 sq mi |
| Water Area : | 6.74 sq mi |
| Latitude : | 40.1935621 |
| Longitude : | -76.7245729 |
| Population (2010): | 21,329 |
| Population Estimate (2012) : | 22,116 |
| Population Density : | 660.22/sq mi |
| Housing Units (2012) : | 9,602 |
| Median Household Income (2012) : | $54,793 (Pennsylvania : $52,267, USA : $53,046) |
| Median Family Income (2012) : | $69,660 (Pennsylvania : $65,980, USA : $64,585) |
| Median House Price (2012) : | $139,100 (Pennsylvania : $164,900, USA : $181,400) |