Oak Park zip code
Zip code in Oak Park, PA
The location Oak Park belongs to Northumberland County, state of Pennsylvania. Oak Park has been assigned with the zip code 17857.
The location name Oak Park is listed as unacceptable by the US Postal Service so any mailing should avoid it. Instead you can use Northumberland, the official name of the location. You can also use any of the following names: Northumberlnd.
| Zip code | Type | Population |
|---|---|---|
| 17857 | STANDARD | 6,940 |
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