Smithfield PA ZIP Code
Smithfield city is located in Pennsylvania State, Fayette County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Smithfield PA zip code by its streets and block numbers if we have some of the Smithfield streets loaded in our website
Smithfield Area Code is 724 and Time Zone is Eastern (GMT -05:00).
Smithfield Zip Code - Pennsylvania
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Smithfield City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Smithfield ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Smithfield, Pennsylvania.
The Smithfield Zip Code is 15478.
If you want to send a mail to Smithfield City, you should use the 15478 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Smithfield 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 15478 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Smithfield 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.