Montana Population By County in 2013

Updated on January 27, 2024.

Based on the US Census Vintage data estimates, in 2013, the population of Montana was 1,014,158. Among all Montana counties, Yellowstone[object Promise] had the highest population (153,857), followed by Missoula[object Promise] (111,988), and Gallatin[object Promise] (94,885). Petroleum[object Promise] was the least populated county (505).

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 2013
Montana Population By County in 2013
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County Population % of State Population
Beaverhead 9307 0.92
Big Horn 13114 1.29
Blaine 6638 0.66
Broadwater 5678 0.56
Carbon 10338 1.02
Carter 1152 0.11
Cascade 82241 8.11
Chouteau 5854 0.58
Custer 11883 1.17
Daniels 1778 0.18
Dawson 9392 0.93
Deer Lodge 9264 0.91
Fallon 3047 0.30
Fergus 11470 1.13
Flathead 92988 9.17
Gallatin 94885 9.36
Garfield 1254 0.12
Glacier 13793 1.36
Golden Valley 846 0.08
Granite 3067 0.30
Hill 16534 1.63
Jefferson 11457 1.13
Judith Basin 2002 0.20
Lake 29138 2.87
Lewis and Clark 65277 6.44
Liberty 2364 0.23
Lincoln 19437 1.92
McCone 1714 0.17
Madison 7679 0.76
Meagher 1905 0.19
Mineral 4230 0.42
Missoula 111988 11.04
Musselshell 4684 0.46
Park 15705 1.55
Petroleum 505 0.05
Phillips 4163 0.41
Pondera 6218 0.61
Powder River 1754 0.17
Powell 6953 0.69
Prairie 1163 0.12
Ravalli 40698 4.01
Richland 11173 1.10
Roosevelt 11087 1.09
Rosebud 9303 0.92
Sanders 11314 1.12
Sheridan 3626 0.36
Silver Bow 34610 3.41
Stillwater 9250 0.91
Sweet Grass 3657 0.36
Teton 6053 0.60
Toole 5125 0.51
Treasure 688 0.07
Valley 7636 0.75
Wheatland 2121 0.21
Wibaux 1101 0.11
Yellowstone 153857 15.17