Union County, Pennsylvania ZIP Codes
- ZIP records
11 - Cities represented
11 - Sum of listed ZIP population estimates
36,864
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 17837 | Lewisburg | 18,403 |
| 2 | 17844 | Mifflinburg | 10,291 |
| 3 | 17856 | New Columbia | 3,167 |
| 4 | 17845 | Millmont | 2,058 |
| 5 | 17855 | New Berlin | 1,014 |
| 6 | 17886 | West Milton | 804 |
| 7 | 17887 | White Deer | 591 |
| 8 | 17829 | Hartleton | 212 |
| 9 | 17885 | Weikert | 181 |
| 10 | 17835 | Laurelton | 114 |
Cities in Union County
- Hartleton
- Laurelton
- Lewisburg
- Mifflinburg
- Millmont
- New Berlin
- New Columbia
- Swengel
- Weikert
- West Milton
- White Deer
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Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.