Hay WA ZIP Code
Hay city is located in Washington State, Whitman County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Hay WA zip code by its streets and block numbers if we have some of the Hay streets loaded in our website
Hay Area Code is 509 and Time Zone is Pacific (GMT -08:00).
Hay Zip Code - Washington
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Hay City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Hay ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Hay, Washington.
The Hay Zip Code is 99136.
If you want to send a mail to Hay City, you should use the 99136 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Hay 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 99136 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Hay 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.