Kennewick WA ZIP Code
Kennewick 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 Kennewick WA zip code by its streets and block numbers if we have some of the Kennewick streets loaded in our website
Kennewick Area Code is 509 and Time Zone is Pacific (GMT -08:00).
Kennewick Zip Code - Washington
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Kennewick City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Kennewick ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Kennewick, Washington.
The Kennewick Zip Code is 99336, 99337, 99338.
If you want to send a mail to Kennewick City, you should use the 99336, 99337, 99338 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Kennewick 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 99336, 99337, 99338 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Kennewick 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.