Lake County ZIP Codes
Montana, United States · 12 codes
Lake County in Montana has 12 ZIP codes, from 59821 to 59931, serving 12 places.
ZIP codes in Lake
Frequently asked questions
What is the ZIP code of Lake?
Lake has 12 ZIP codes, from 59821 to 59931. The table lists the places each one serves.
How many places are listed in Lake County?
12 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.