Ilwaco WA ZIP Code
Ilwaco city is located in Washington State, Pacific County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Ilwaco WA zip code by its streets and block numbers if we have some of the Ilwaco streets loaded in our website
Ilwaco Area Code is 360 and Time Zone is Pacific (GMT -08:00).
Ilwaco Zip Code - Washington
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Ilwaco City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Ilwaco ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Ilwaco, Washington.
The Ilwaco Zip Code is 98624.
If you want to send a mail to Ilwaco City, you should use the 98624 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Ilwaco 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 98624 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Ilwaco 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.