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 160,137
2 Missoula County 118,791
3 Gallatin County 111,876
4 Flathead County 102,106
5 Cascade County 81,643
6 Lewis and Clark County 68,700
7 Ravalli County 43,172
8 Silver Bow County 34,993
9 Lake County 30,250
10 Lincoln County 19,794
11 Park County 16,736
12 Hill County 16,347
13 Glacier County 13,747
14 Big Horn County 13,338
15 Jefferson County 12,097
16 Sanders County 11,844
17 Custer County 11,586
18 Fergus County 11,113
19 Roosevelt County 11,059
20 Richland County 10,913
21 Carbon County 10,714
22 Stillwater County 9,534
23 Beaverhead County 9,404
24 Deer Lodge County 9,131
25 Rosebud County 9,063
26 Madison County 8,768
27 Dawson County 8,680
28 Valley County 7,437
29 Powell County 6,968
30 Blaine County 6,807
31 Teton County 6,162
32 Broadwater County 6,085
33 Pondera County 5,972
34 Chouteau County 5,745
35 Toole County 4,853
36 Musselshell County 4,651
37 Mineral County 4,316
38 Phillips County 4,074
39 Sweet Grass County 3,710
40 Sheridan County 3,424
41 Granite County 3,378
42 Fallon County 2,920
43 Liberty County 2,430
44 Wheatland County 2,236
45 Judith Basin County 1,952
46 Meagher County 1,866
47 Daniels County 1,747
48 Powder River County 1,716
49 McCone County 1,675
50 Garfield County 1,268
51 Carter County 1,238
52 Prairie County 1,087
53 Wibaux County 1,034
54 Golden Valley County 826
55 Treasure County 679
56 Petroleum County 513

United States Census Bureau. B01001 SEX BY AGE, 2017 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 6 December 2018. http://www.census.gov/.

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2018. U.S. Census Bureau, Population Division. Web. May 2019. http://www.census.gov/.

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