Hamilton WA ZIP Code
Hamilton city is located in Washington State, Skagit County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Hamilton WA zip code by its streets and block numbers if we have some of the Hamilton streets loaded in our website
Hamilton Area Code is 360 and Time Zone is Pacific (GMT -08:00).
Hamilton Zip Code - Washington
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Hamilton City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Hamilton ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Hamilton, Washington.
The Hamilton Zip Code is 98255.
If you want to send a mail to Hamilton City, you should use the 98255 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Hamilton 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 98255 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Hamilton 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.