Prosser WA ZIP Code
Prosser 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 Prosser WA zip code by its streets and block numbers if we have some of the Prosser streets loaded in our website
Prosser Area Code is 509 and Time Zone is Pacific (GMT -08:00).
Prosser Zip Code - Washington
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Prosser City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Prosser ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Prosser, Washington.
The Prosser Zip Code is 99350.
If you want to send a mail to Prosser City, you should use the 99350 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Prosser 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 99350 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Prosser 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.