Montana

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Montana counties by population

Number of counties: 56
Population: 1,077,978
Largest county: Yellowstone County
Table of counties in Montana sorted by population from largest to smallest.
CountyPopulation
Yellowstone County163,593
Missoula County117,379
Gallatin County116,725
Flathead County103,400
Cascade County84,178
Lewis and Clark County70,340
Ravalli County43,790
Silver Bow County35,017
Lake County31,030
Lincoln County19,674
Park County17,072
Hill County16,297
Glacier County13,827
Big Horn County13,198
Sanders County12,298
Jefferson County12,057
Custer County11,968
Fergus County11,464
Richland County11,375
Roosevelt County10,884
Carbon County10,488
Beaverhead County9,391
Deer Lodge County9,380
Dawson County9,003
Stillwater County8,916
Madison County8,499
Rosebud County8,464
Valley County7,553
Blaine County7,051
Powell County6,955
Broadwater County6,641
Teton County6,173
Pondera County5,974
Chouteau County5,896
Toole County5,013
Musselshell County4,813
Mineral County4,490
Phillips County4,233
Sweet Grass County3,690
Sheridan County3,522
Granite County3,333
Fallon County3,074
Wheatland County2,082
Liberty County2,026
Judith Basin County2,004
Meagher County1,932
McCone County1,805
Powder River County1,759
Daniels County1,739
Carter County1,349
Prairie County1,227
Wibaux County1,018
Garfield County972
Golden Valley County820
Treasure County693
Petroleum County434

What is the largest county in Montana?

Yellowstone County is the largest county in Montana with a population of 163,593.

TOP-5 counties by population in Montana:
  • Yellowstone County
  • Missoula County
  • Gallatin County
  • Flathead County
  • Cascade County