Willow Street PA ZIP Code
Willow Street city is located in Pennsylvania State, Lancaster County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Willow Street PA zip code by its streets and block numbers if we have some of the Willow Street streets loaded in our website
Willow Street Area Code is 717 and Time Zone is Eastern (GMT -05:00).
Willow Street Zip Code - Pennsylvania
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Willow Street City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Willow Street ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Willow Street, Pennsylvania.
The Willow Street Zip Code is 17584.
If you want to send a mail to Willow Street City, you should use the 17584 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Willow Street 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 17584 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Willow Street 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.