There are 22 zip codes in Northampton County, Pennsylvania. The most populated is 18042, located in Easton. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
1804244,818Easton
1801740,587Bethlehem
1801533,472Bethlehem
1804529,563Easton
1806427,112Nazareth
1802021,153Bethlehem
1806719,166Northampton
1801317,962Bangor
1804017,090Easton
1801412,389Bath
1805511,796Hellertown
180888,118Walnutport
180726,937Pen Argyl
180915,888Wind Gap
183433,964Mount Bethel
180383,466Danielsville
18085887Tatamy
18351606Portland
18083594Stockertown
18086521Treichlers
18063280Martins Creek
1803525Cherryville

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