Riverside WA ZIP Code
Riverside city is located in Washington State, Okanogan County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Riverside WA zip code by its streets and block numbers if we have some of the Riverside streets loaded in our website
Riverside Area Code is 509 and Time Zone is Pacific (GMT -08:00).
Riverside Zip Code - Washington
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Riverside City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Riverside ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Riverside, Washington.
The Riverside Zip Code is 98849.
If you want to send a mail to Riverside City, you should use the 98849 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Riverside 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 98849 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Riverside 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.