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 161,300
2 Missoula County 119,600
3 Gallatin County 114,434
4 Flathead County 103,806
5 Cascade County 81,366
6 Lewis and Clark County 69,432
7 Ravalli County 43,806
8 Silver Bow County 34,915
9 Lake County 30,458
10 Lincoln County 19,980
11 Park County 16,606
12 Hill County 16,484
13 Glacier County 13,753
14 Big Horn County 13,319
15 Jefferson County 12,221
16 Sanders County 12,113
17 Custer County 11,402
18 Fergus County 11,050
19 Roosevelt County 11,004
20 Richland County 10,803
21 Carbon County 10,725
22 Stillwater County 9,642
23 Beaverhead County 9,453
24 Deer Lodge County 9,140
25 Rosebud County 8,937
26 Dawson County 8,613
27 Madison County 8,600
28 Valley County 7,396
29 Powell County 6,890
30 Blaine County 6,681
31 Broadwater County 6,237
32 Teton County 6,147
33 Pondera County 5,911
34 Chouteau County 5,635
35 Toole County 4,736
36 Musselshell County 4,633
37 Mineral County 4,397
38 Phillips County 3,954
39 Sweet Grass County 3,737
40 Granite County 3,379
41 Sheridan County 3,309
42 Fallon County 2,846
43 Liberty County 2,337
44 Wheatland County 2,126
45 Judith Basin County 2,007
46 Meagher County 1,862
47 Daniels County 1,690
48 Powder River County 1,682
49 McCone County 1,664
50 Garfield County 1,258
51 Carter County 1,252
52 Prairie County 1,077
53 Wibaux County 969
54 Golden Valley County 821
55 Treasure County 696
56 Petroleum County 487

United States Census Bureau. B01001 SEX BY AGE, 2018 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 19 December 2019. http://www.census.gov/.

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/.

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