Custer County ZIP Codes
Montana, United States · 4 codes
Custer County in Montana has 4 ZIP codes, from 59301 to 59351, serving 4 places.
ZIP codes in Custer
Frequently asked questions
What is the ZIP code of Custer?
Custer has 4 ZIP codes, from 59301 to 59351. The table lists the places each one serves.
How many places are listed in Custer County?
4 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.