County Census Records
Montana Counties
57 counties with population data from the decennial US Census, 1790 to 2020.
57 counties
Population as of 2020 census
Beaverhead
9,371
Big Horn
13,124
Blaine
7,044
Broadwater
6,774
Carbon
10,473
Carter
1,415
Cascade
84,414
Chouteau
5,895
Custer
11,867
Daniels
1,661
Dawson
8,940
Deer Lodge
9,421
Fallon
3,049
Fergus
11,446
Flathead
104,357
Gallatin
118,960
Garfield
1,173
Glacier
13,778
Golden Valley
823
Granite
3,309
Hill
16,309
Jefferson
12,085
Judith Basin
2,023
Lake
31,134
Lewis and Clark
70,973
Liberty
1,959
Lincoln
19,677
Madison
8,623
McCone
1,729
Meagher
1,927
Mineral
4,535
Missoula
117,922
Musselshell
4,730
Park
17,191
Petroleum
496
Phillips
4,217
Pondera
5,898
Powder River
1,694
Powell
6,946
Prairie
1,088
Ravalli
44,174
Richland
11,491
Roosevelt
10,794
Rosebud
8,329
Sanders
12,400
Sheridan
3,539
Silver Bow
35,133
Stillwater
8,963
Sweet Grass
3,678
Teton
6,226
Toole
4,971
Treasure
762
Valley
7,578
Wheatland
2,069
Wibaux
937
Yellowstone
164,731
Yellowstone Nat.Pk.
52
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Geology
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Native Heritage
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Settlement
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Notable People
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