ZIP Codes in New Wilmington, PA
New Wilmington uses 2 ZIP codes, all in Mercer, Lawrence Counties. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 2 New Wilmington ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 16142 | standard | Mercer | 5,522 |
| 16172 | standard | Lawrence | 983 |
Finding a ZIP+4 in New Wilmington
Knowing which of these 2 ZIP codes covers an address only gets you partway. The four-digit extension identifies the specific delivery point — typically one side of one block. Two houses facing each other on the same New Wilmington street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
Upload a CSV of New Wilmington addresses and download it complete.