First-level division
🇺🇸 Montana
Subdivisions
Yellowstone
Population 164,731
Gallatin
Population 118,960
Missoula
Population 117,922
Flathead
Population 104,357
Cascade
Population 84,414
Lewis and Clark County
Population 63,395
Ravalli
Population 44,174
Silver Bow County
Population 34,200
Lake
Population 31,134
Lincoln
Population 19,677
Park
Population 17,191
Hill
Population 16,309
Glacier
Population 13,778
Big Horn
Population 13,124
Sanders
Population 12,400
Jefferson
Population 12,085
Custer
Population 11,867
Richland
Population 11,491
Fergus
Population 11,446
Roosevelt
Population 10,794
Carbon
Population 10,473
Beaverhead
Population 9,371
Deer Lodge County
Population 9,298
Stillwater
Population 8,963
Dawson
Population 8,940
Madison
Population 8,623
Rosebud
Population 8,329
Valley
Population 7,578
Blaine
Population 7,044
Powell
Population 6,946
Broadwater County
Population 6,774
Teton
Population 6,226
Pondera
Population 5,898
Chouteau County
Population 5,895
Toole
Population 4,971
Musselshell
Population 4,730
Mineral
Population 4,535
Phillips
Population 4,217
Sweet Grass
Population 3,651
Sheridan
Population 3,539
Granite
Population 3,309
Fallon
Population 3,049
Judith Basin
Population 2,072
Wheatland
Population 2,069
Liberty
Population 1,959
Meagher
Population 1,927
Powder River
Population 1,743
McCone
Population 1,729
Daniels
Population 1,661
Carter
Population 1,415
Garfield
Population 1,173
Prairie
Population 1,088
Wibaux
Population 937
Golden Valley
Population 884
Treasure
Population 762
Petroleum
Population 496