Montana

List of Counties in Montana

The state of Montana has a total of 56 counties. Beaverhead County is the oldest (founded in 1864) while Petroleum County is the youngest (established in 1926).

Yellowstone County is the most populous, with a population of 155,634. Beaverhead County has the most land area (14,356 km2), while Silver Bow County has the smallest (1,860 km2).

Please find a list of all Montana counties arranged alphabetically below.

  • Beaverhead County, MT
  • Big Horn County, MT
  • Blaine County, MT
  • Broadwater County, MT
  • Carbon County, MT
  • Carter County, MT
  • Cascade County, MT
  • Chouteau County, MT
  • Custer County, MT
  • Daniels County, MT
  • Dawson County, MT
  • Deer Lodge County, MT
  • Fallon County, MT
  • Fergus County, MT
  • Flathead County, MT
  • Gallatin County, MT
  • Garfield County, MT
  • Glacier County, MT
  • Golden Valley County, MT
  • Granite County, MT
  • Hill County, MT
  • Jefferson County, MT
  • Judith Basin County, MT
  • Lake County, MT
  • Lewis and Clark County, MT
  • Liberty County, MT
  • Lincoln County, MT
  • Madison County, MT
  • McCone County, MT
  • Meagher County, MT
  • Mineral County, MT
  • Missoula County, MT
  • Musselshell County, MT
  • Park County, MT
  • Petroleum County, MT
  • Phillips County, MT
  • Pondera County, MT
  • Powder River County, MT
  • Powell County, MT
  • Prairie County, MT
  • Ravalli County, MT
  • Richland County, MT
  • Roosevelt County, MT
  • Rosebud County, MT
  • Sanders County, MT
  • Sheridan County, MT
  • Silver Bow County, MT
  • Stillwater County, MT
  • Sweet Grass County, MT
  • Teton County, MT
  • Toole County, MT
  • Treasure County, MT
  • Valley County, MT
  • Wheatland County, MT
  • Wibaux County, MT
  • Yellowstone County, MT

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