| Post Office | Lewisburg |
| County | Union |
| ZIP Code |
17837
|
| Post Office | Mifflinburg |
| County | Union |
| ZIP Code |
17844
|
| Post Office | New Columbia |
| County | Union |
| ZIP Code |
17856
|
| Post Office | Winfield |
| County | Union |
| ZIP Code |
17889
|
| Post Office | Millmont |
| County | Union |
| ZIP Code |
17845
|
| Post Office | West Milton |
| County | Union |
| ZIP Code |
17886
|
Union County covers multiple cities and each city can have one or more ZIP Codes assigned by USPS for accurate mail delivery.
Each city in Union County may have one or more ZIP Codes.
ZIP Codes are assigned and maintained by the United States Postal Service (USPS).
Counties contain multiple cities and towns, so ZIP Codes help organize delivery routes.
Use the dropdowns above to choose your city and get its ZIP Code.
Yes, sometimes ZIP Code areas can cross county lines for postal convenience.
12 city/cities found in Union. Explore ZIP code details in Pennsylvania for county Union.