Carter County ZIP Codes
Montana, United States · 5 codes
Carter County in Montana has 5 ZIP codes, from 59311 to 59332, serving 5 places.
ZIP codes in Carter
Frequently asked questions
What is the ZIP code of Carter?
Carter has 5 ZIP codes, from 59311 to 59332. The table lists the places each one serves.
How many places are listed in Carter County?
5 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.