Cascade County ZIP Codes
Montana, United States · 18 codes
Cascade County in Montana has 18 ZIP codes, from 59401 to 59487, serving 18 places.
ZIP codes in Cascade
Frequently asked questions
What is the ZIP code of Cascade?
Cascade has 18 ZIP codes, from 59401 to 59487. The table lists the places each one serves.
How many places are listed in Cascade 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.