Chinook MT ZIP Code
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Chinook city is located in Montana State, Blaine County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Chinook MT zip code by its streets and block numbers if we have some of the Chinook streets loaded in our website
Chinook Area Code is 406 and Time Zone is Mountain (GMT -07:00).
Chinook Zip Code - Montana
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Chinook City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Chinook ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Chinook, Montana.
The Chinook Zip Code is 59523.
If you want to send a mail to Chinook City, you should use the 59523 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Chinook 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 59523 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Chinook 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 Montana.