Mattawa WA ZIP Code
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Mattawa city is located in Washington State, Grant County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Mattawa WA zip code by its streets and block numbers if we have some of the Mattawa streets loaded in our website
Mattawa Area Code is 509 and Time Zone is Pacific (GMT -08:00).
Mattawa Zip Code - Washington
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Mattawa City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Mattawa ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Mattawa, Washington.
The Mattawa Zip Code is 99349.
If you want to send a mail to Mattawa City, you should use the 99349 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Mattawa 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 99349 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Mattawa 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.