Cosmopolis WA ZIP Code
Cosmopolis city is located in Washington State, Grays Harbor County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Cosmopolis WA zip code by its streets and block numbers if we have some of the Cosmopolis streets loaded in our website
Cosmopolis Area Code is 360 and Time Zone is Pacific (GMT -08:00).
Cosmopolis Zip Code - Washington
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Cosmopolis City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Cosmopolis ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Cosmopolis, Washington.
The Cosmopolis Zip Code is 98537.
If you want to send a mail to Cosmopolis City, you should use the 98537 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Cosmopolis 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 98537 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Cosmopolis 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.