Montana / Counties by Population

Montana Counties by Population

The data is from the US Census. Below are 56 Montana counties ranked 1 through 56 . You can copy and paste this list directly into your favorite spreadsheet program. Don't you just adore lovely numbers listed nicely in columns & rows? We do!

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Rank County Population
1 Yellowstone County 159,008
2 Missoula County 117,309
3 Gallatin County 108,063
4 Flathead County 99,899
5 Cascade County 81,625
6 Lewis and Clark County 67,805
7 Ravalli County 42,512
8 Silver Bow County 34,770
9 Lake County 30,013
10 Lincoln County 19,537
11 Hill County 16,436
12 Park County 16,352
13 Glacier County 13,732
14 Big Horn County 13,387
15 Jefferson County 11,917
16 Custer County 11,729
17 Sanders County 11,681
18 Fergus County 11,221
19 Richland County 11,199
20 Roosevelt County 11,175
21 Carbon County 10,597
22 Stillwater County 9,466
23 Beaverhead County 9,415
24 Rosebud County 9,152
25 Deer Lodge County 9,106
26 Dawson County 9,017
27 Madison County 8,302
28 Valley County 7,471
29 Powell County 6,854
30 Blaine County 6,719
31 Teton County 6,086
32 Pondera County 5,994
33 Broadwater County 5,945
34 Chouteau County 5,732
35 Toole County 4,892
36 Musselshell County 4,766
37 Mineral County 4,251
38 Phillips County 4,077
39 Sweet Grass County 3,670
40 Sheridan County 3,483
41 Granite County 3,311
42 Fallon County 2,921
43 Liberty County 2,351
44 Wheatland County 2,142
45 Judith Basin County 1,954
46 Meagher County 1,888
47 McCone County 1,790
48 Daniels County 1,730
49 Powder River County 1,607
50 Carter County 1,331
51 Prairie County 1,252
52 Wibaux County 1,122
53 Garfield County 1,036
54 Golden Valley County 728
55 Treasure County 668
56 Petroleum County 453

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2019. U.S. Census Bureau, Population Division. Web. May 2020. http://www.census.gov/.

United States Census Bureau. B01001 SEX BY AGE, 2019 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 10 December 2020. http://www.census.gov/.

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