Montana Population By County in 2022

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2022, the population of Montana was 1,122,878. Among all Montana counties, Yellowstone had the highest population (169,870), followed by Gallatin (124,938), and Missoula (121,011). Petroleum was the least populated county (521).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.

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Montana Population By County in 2022
Montana Population By County in 2022
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County Population % of State Population
Beaverhead 9747 0.87
Big Horn 12826 1.14
Blaine 6972 0.62
Broadwater 7771 0.69
Carbon 11236 1.00
Carter 1403 0.13
Cascade 85001 7.57
Chouteau 5908 0.53
Custer 12000 1.07
Daniels 1645 0.15
Dawson 8807 0.78
Deer Lodge 9544 0.85
Fallon 3050 0.27
Fergus 11672 1.04
Flathead 111885 9.96
Gallatin 124938 11.13
Garfield 1218 0.11
Glacier 13650 1.22
Golden Valley 826 0.07
Granite 3497 0.31
Hill 16118 1.44
Jefferson 12831 1.14
Judith Basin 2079 0.19
Lake 32853 2.93
Lewis and Clark 73784 6.57
Liberty 1974 0.18
Lincoln 21510 1.92
McCone 1711 0.15
Madison 9252 0.82
Meagher 2026 0.18
Mineral 5020 0.45
Missoula 121011 10.78
Musselshell 5169 0.46
Park 17753 1.58
Petroleum 521 0.05
Phillips 4228 0.38
Pondera 6092 0.54
Powder River 1732 0.15
Powell 7078 0.63
Prairie 1108 0.10
Ravalli 47177 4.20
Richland 11230 1.00
Roosevelt 10537 0.94
Rosebud 8152 0.73
Sanders 13384 1.19
Sheridan 3555 0.32
Silver Bow 35947 3.20
Stillwater 9169 0.82
Sweet Grass 3727 0.33
Teton 6346 0.56
Toole 5077 0.45
Treasure 754 0.07
Valley 7542 0.67
Wheatland 2038 0.18
Wibaux 927 0.08
Yellowstone 169870 15.13