Colfax WA ZIP Code
Colfax 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 Colfax WA zip code by its streets and block numbers if we have some of the Colfax streets loaded in our website
Colfax Area Code is 509 and Time Zone is Pacific (GMT -08:00).
Colfax Zip Code - Washington
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Colfax City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Colfax ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Colfax, Washington.
The Colfax Zip Code is 99111.
If you want to send a mail to Colfax City, you should use the 99111 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Colfax 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 99111 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Colfax 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.