There are 28 zip codes in Lehigh County, Pennsylvania. The most populated is 18102, located in Allentown. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
1810251,640Allentown
1810348,344Allentown
1810446,259Allentown
1801831,479Bethlehem
1805229,286Whitehall
1806226,722Macungie
1804918,727Emmaus
1810917,745Allentown
1803614,532Coopersburg
1803112,337Breinigsville
1808011,251Slatington
180329,468Catasauqua
180349,228Center Valley
180698,593Orefield
180787,543Schnecksville
180377,360Coplay
181066,759Allentown
181015,673Allentown
180665,612New Tripoli
180513,390Fogelsville
180923,078Zionsville
180532,565Germansville
18087762Trexlertown
18059728Laurys Station
18079550Slatedale
18065271Neffs
18046142East Texas
181950Allentown
showing: 28 rows

Zip Codes in Lehigh County, Pennsylvania by Population (2024)