- Beaverhead
- Big Horn
- Blaine
- Broadwater
- Carbon
- Carter
- Cascade
- Chouteau
- Custer
- Daniels
- Dawson
- Deer Lodge
- Fallon
- Fergus
- Flathead
- Gallatin
- Garfield
- Glacier
- Golden Valley
- Granite
- Hill
- Jefferson
- Judith Basin
- Lake
- Lewis and Clark
- Liberty
- Lincoln
- Madison
- McCone
- Meagher
- Mineral
- Missoula
- Musselshell
- Park
- Petroleum
- Phillips
- Pondera
- Powder River
- Powell
- Prairie
- Ravalli
- Richland
- Roosevelt
- Rosebud
- Sanders
- Sheridan
- Silver Bow
- Stillwater
- Sweet Grass
- Teton
- Toole
- Treasure
- Valley
- Wheatland
- Wibaux
- Yellowstone
Counties by State
All the counties in Montana (MT)
Click on one of the county names below, or use the search box to find the zip code information you need.
US Zip Code Information: