USA
> Pennsylvania > Zip Code 18104
| Zip Code : | 18104 |
| City : | Allentown city, Cetronia, Dorneyville, Wescosville |
| County : | Lehigh County |
| State : | Pennsylvania (PA) |
| Land Area : | 23.10 sq mi |
| Water Area : | 0.21 sq mi |
| Latitude : | 40.6116576 |
| Longitude : | -75.5468526 |
| Population (2010): | 43,236 |
| Population Estimate (2012) : | 43,396 |
| Population Density : | 1,871.71/sq mi |
| Housing Units (2012) : | 17,599 |
| Median Household Income (2012) : | $65,339 (Pennsylvania : $52,267, USA : $53,046) |
| Median Family Income (2012) : | $81,135 (Pennsylvania : $65,980, USA : $64,585) |
| Median House Price (2012) : | $219,900 (Pennsylvania : $164,900, USA : $181,400) |