There are 11 zip codes in Union County, Pennsylvania. The most populated is 17837, located in Lewisburg. * 2024 populations estimated based on the latest ACS 5-year data.

CSV JSON
Zip Code
Population
City
1783718,670Lewisburg
1784410,227Mifflinburg
178563,107New Columbia
178452,051Millmont
17887810White Deer
17855793New Berlin
17886657West Milton
17829244Hartleton
17885221Weikert
17835162Laurelton
1788046Swengel

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