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> Pennsylvania > Zip Code 18109
| Zip Code : | 18109 |
| City : | Allentown city |
| County : | Northampton County, Lehigh County |
| State : | Pennsylvania (PA) |
| Land Area : | 8.20 sq mi |
| Water Area : | 0.25 sq mi |
| Latitude : | 40.6369380 |
| Longitude : | -75.4398931 |
| Population (2010): | 16,932 |
| Population Estimate (2012) : | 16,274 |
| Population Density : | 2,065.75/sq mi |
| Housing Units (2012) : | 7,269 |
| Median Household Income (2012) : | $40,510 (Pennsylvania : $52,267, USA : $53,046) |
| Median Family Income (2012) : | $49,952 (Pennsylvania : $65,980, USA : $64,585) |
| Median House Price (2012) : | $146,800 (Pennsylvania : $164,900, USA : $181,400) |