100 Largest ZIP Codes in the United States by Population in Union County, Pennsylvania
Explore the 100 largest ZIP codes in the United States ranked by population using U.S. Census demographic data. This page lists ZIP codes located in Union County, Pennsylvania.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 17837 | LEWISBURG | PA | 18,670 |
| 2 | 17844 | MIFFLINBURG | PA | 10,227 |
| 3 | 17856 | NEW COLUMBIA | PA | 3,107 |
| 4 | 17889 | WINFIELD | PA | 2,997 |
| 5 | 17845 | MILLMONT | PA | 2,051 |
| 6 | 17887 | WHITE DEER | PA | 810 |
| 7 | 17855 | NEW BERLIN | PA | 793 |
| 8 | 17886 | WEST MILTON | PA | 657 |
| 9 | 17829 | HARTLETON | PA | 244 |
| 10 | 17885 | WEIKERT | PA | 221 |
| 11 | 17835 | LAURELTON | PA | 162 |
| 12 | 17880 | SWENGEL | PA | 46 |