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Total Population in Montana, by County

Total Population for every county in Montana, ranked. The highest is Yellowstone County at 168,957 and the lowest is Petroleum County at 447.

Montana: 1,116,875 · United States: 334,922,499 · median county in Montana: 7,519

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#County Total Population
1Yellowstone County168,957
2Gallatin County124,074
3Missoula County120,672
4Flathead County110,695
5Cascade County84,606
6Lewis and Clark County73,464
7Ravalli County46,727
8Silver Bow County35,785
9Lake County32,561
10Lincoln County21,175
11Park County17,710
12Hill County16,155
13Glacier County13,637
14Sanders County13,285
15Big Horn County12,891
16Jefferson County12,774
17Custer County11,961
18Fergus County11,687
19Richland County11,235
20Carbon County11,116
21Roosevelt County10,526
22Beaverhead County9,713
23Deer Lodge County9,597
24Madison County9,223
25Stillwater County9,182
26Dawson County8,827
27Rosebud County8,165
28Broadwater County7,668
29Valley County7,519
30Powell County7,053
31Blaine County6,949
32Teton County6,353
33Pondera County6,035
34Chouteau County5,906
35Musselshell County5,152
36Toole County5,061
37Mineral County4,959
38Phillips County4,221
39Sweet Grass County3,720
40Sheridan County3,669
41Granite County3,462
42Fallon County2,760
43Judith Basin County2,071
44Wheatland County2,056
45Meagher County2,007
46Liberty County1,952
47Powder River County1,815
48McCone County1,670
49Daniels County1,494
50Carter County1,308
51Prairie County1,250
52Wibaux County1,193
53Garfield County1,094
54Golden Valley County899
55Treasure County732
56Petroleum County447

Everyone living in the area, from the 5-year American Community Survey.

Source: ACS 2020-2024 5-Year Estimates, 2024.

Montana ranks 44th of 52 states for total population.

Total Population in other states

Other statistics for Montana by county