Sunnyside WA ZIP Code
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Sunnyside city is located in Washington State, Yakima County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Sunnyside WA zip code by its streets and block numbers if we have some of the Sunnyside streets loaded in our website
Sunnyside Area Code is 509 and Time Zone is Pacific (GMT -08:00).
Sunnyside Zip Code - Washington
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Sunnyside City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Sunnyside ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Sunnyside, Washington.
The Sunnyside Zip Code is 98944.
If you want to send a mail to Sunnyside City, you should use the 98944 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Sunnyside 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 98944 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Sunnyside 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.