Northumberland PA ZIP Code
Northumberland city is located in Pennsylvania State, Northumberland County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Northumberland PA zip code by its streets and block numbers if we have some of the Northumberland streets loaded in our website
Northumberland Area Code is 570 and Time Zone is Eastern (GMT -05:00).
Northumberland Zip Code - Pennsylvania
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Northumberland City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Northumberland ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Northumberland, Pennsylvania.
The Northumberland Zip Code is 17857.
If you want to send a mail to Northumberland City, you should use the 17857 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Northumberland ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 17857 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Northumberland city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in Pennsylvania.