Flathead County ZIP Codes
Montana, United States · 18 codes
Flathead County in Montana has 18 ZIP codes, from 59901 to 59937, serving 18 places.
ZIP codes in Flathead
Frequently asked questions
What is the ZIP code of Flathead?
Flathead has 18 ZIP codes, from 59901 to 59937. The table lists the places each one serves.
How many places are listed in Flathead County?
18 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.