Ranking of Montana Counties By Population in 2011

Updated on July 26, 2024.

Based on the US Census Vintage data estimates, in 2011, the Population for Montana was 997.52K. Among all Montana counties, Yellowstone County had the highest population (149.81K), followed by Missoula County (110.27K), and Gallatin County (91.41K).

The chart below shows the top 10 counties, and the table below shows the ranking of all Montana counties.

You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.

See this for other years:
Ranking of Montana Counties By Population in 2011
Yellowstone
Missoula
Gallatin
Flathead
Cascade
Lewis and Clark
Ravalli
Silver Bow
Lake
Lincoln
Ranking of Montana Counties By Population in 2011
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Rank County Population
1 Yellowstone County 149805
2 Missoula County 110270
3 Gallatin County 91413
4 Flathead County 91282
5 Cascade County 81734
6 Lewis and Clark County 64284
7 Ravalli County 40387
8 Silver Bow County 34420
9 Lake County 28983
10 Lincoln County 19629
11 Hill County 16391
12 Park County 15512
13 Glacier County 13579
14 Big Horn County 13058
15 Custer County 11759
16 Fergus County 11463
17 Sanders County 11402
18 Jefferson County 11373
19 Roosevelt County 10496
20 Richland County 10151
21 Carbon County 10089
22 Rosebud County 9328
23 Deer Lodge County 9282
24 Beaverhead County 9214
25 Stillwater County 9153
26 Dawson County 9030
27 Madison County 7644
28 Valley County 7463
29 Powell County 7084
30 Blaine County 6576
31 Pondera County 6195
32 Teton County 6060
33 Chouteau County 5812
34 Broadwater County 5725
35 Toole County 5157
36 Musselshell County 4747
37 Mineral County 4221
38 Phillips County 4186
39 Sweet Grass County 3584
40 Sheridan County 3418
41 Granite County 3077
42 Fallon County 2930
43 Liberty County 2381
44 Wheatland County 2131
45 Judith Basin County 2011
46 Meagher County 1878
47 Daniels County 1760
48 Powder River County 1739
49 McCone County 1709
50 Garfield County 1254
51 Prairie County 1141
52 Carter County 1136
53 Wibaux County 982
54 Golden Valley County 830
55 Treasure County 709
56 Petroleum County 491