The postal code of Williamsport which is listed in our database is 21795. Our records often include geographical coordinates of Williamsport and it's corresponding postal code. In the result box below, you can find the postal code of Williamsport and it's location on the map if we have the location information available. Every postal code is also located in a region or a district, in case we know the district or region of the city it will too be listed in the results. All kinds of additional information we have on Williamsport may also be present such as geographical data, historical records or news about Williamsport and 21795 in general.