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> Pennsylvania > Zip Code 18103
| Zip Code : | 18103 |
| City : | Allentown city, Dorneyville, Wescosville |
| County : | Lehigh County |
| State : | Pennsylvania (PA) |
| Land Area : | 17.61 sq mi |
| Water Area : | 0.12 sq mi |
| Latitude : | 40.5703077 |
| Longitude : | -75.4889264 |
| Population (2010): | 45,336 |
| Population Estimate (2012) : | 48,021 |
| Population Density : | 2,574.56/sq mi |
| Housing Units (2012) : | 18,827 |
| Median Household Income (2012) : | $49,873 (Pennsylvania : $52,267, USA : $53,046) |
| Median Family Income (2012) : | $60,309 (Pennsylvania : $65,980, USA : $64,585) |
| Median House Price (2012) : | $174,900 (Pennsylvania : $164,900, USA : $181,400) |