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Population per Square Mile in Montana, by County

Population per Square Mile for every county in Montana, ranked. The highest is Yellowstone County at 64.2 and the lowest is Garfield County at 0.2.

Montana: 7.7 · United States: n/a · median county in Montana: 2.7

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#County Population per Square Mile
1Yellowstone County64.2
2Silver Bow County49.8
3Gallatin County47.6
4Missoula County46.5
5Cascade County31.4
6Flathead County21.8
7Lake County21.8
8Lewis and Clark County21.2
9Ravalli County19.5
10Deer Lodge County13.0
11Jefferson County7.7
12Broadwater County6.4
13Park County6.3
14Lincoln County5.9
15Hill County5.6
16Carbon County5.4
17Richland County5.4
18Stillwater County5.1
19Sanders County4.8
20Glacier County4.6
21Roosevelt County4.5
22Mineral County4.1
23Dawson County3.7
24Pondera County3.7
25Custer County3.2
26Powell County3.0
27Musselshell County2.8
28Teton County2.8
29Fergus County2.7
30Big Horn County2.6
31Madison County2.6
32Toole County2.6
33Sheridan County2.2
34Granite County2.0
35Sweet Grass County2.0
36Beaverhead County1.8
37Fallon County1.7
38Blaine County1.6
39Rosebud County1.6
40Chouteau County1.5
41Valley County1.5
42Liberty County1.4
43Wheatland County1.4
44Wibaux County1.3
45Judith Basin County1.1
46Daniels County1.0
47Golden Valley County0.8
48Meagher County0.8
49Phillips County0.8
50Prairie County0.7
51Treasure County0.7
52McCone County0.6
53Powder River County0.6
54Carter County0.4
55Petroleum County0.3
56Garfield County0.2

People divided by land area. Water is excluded, so lake and coastal counties are not unfairly diluted.

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

Montana ranks 50th of 52 states for population per square mile.

Population per Square Mile in other states

Other statistics for Montana by county