Plymouth WA ZIP Code
Plymouth city is located in Washington State, Benton County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Plymouth WA zip code by its streets and block numbers if we have some of the Plymouth streets loaded in our website
Plymouth Area Code is 509 and Time Zone is Pacific (GMT -08:00).
Plymouth Zip Code - Washington
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Plymouth City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Plymouth ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Plymouth, Washington.
The Plymouth Zip Code is 99346.
If you want to send a mail to Plymouth City, you should use the 99346 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Plymouth 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 99346 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Plymouth 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 Washington.