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County | 2024 Pop. | Change (2020) | Area (mi²) | Density (/mi²) | Location |
---|---|---|---|---|---|
Yellowstone County | 171,816 | 3.99% | 1K | 65 | |
Gallatin County | 127,880 | 6.93% | 1K | 49 | |
Missoula County | 122,687 | 3.67% | 1K | 47 | |
Flathead County | 115,473 | 10.1% | 2K | 23 | |
Cascade County | 84,799 | 0.46% | 1K | 31 | |
Lewis and Clark County | 76,238 | 7.11% | 1.3K | 22 | |
Ravalli County | 48,299 | 8.75% | 923 | 20 | |
Silver Bow County | 36,773 | 4.44% | 277 | 51 | |
Lake County | 33,823 | 8.21% | 575 | 23 | |
Lincoln County | 22,280 | 12.9% | 1.4K | 6 | |
Park County | 18,053 | 4.82% | 1.1K | 6 | |
Hill County | 16,434 | 1% | 1.1K | 6 | |
Sanders County | 13,984 | 12.25% | 1.1K | 5 | |
Glacier County | 13,568 | -1.29% | 1.2K | 5 | |
Jefferson County | 13,265 | 9.25% | 640 | 8 | |
Big Horn County | 12,676 | -3.09% | 1.9K | 3 | |
Custer County | 11,970 | 0.88% | 1.5K | 3 | |
Fergus County | 11,872 | 3.46% | 1.7K | 3 | |
Carbon County | 11,602 | 10.44% | 791 | 6 | |
Richland County | 11,116 | -3.62% | 805 | 5 | |
Roosevelt County | 10,101 | -6.48% | 909 | 4 | |
Beaverhead County | 10,023 | 6.83% | 2.1K | 2 | |
Deer Lodge County | 9,802 | 4.06% | 284 | 13 | |
Madison County | 9,790 | 13.04% | 1.4K | 3 | |
Stillwater County | 9,177 | 1.93% | 694 | 5 | |
Dawson County | 8,813 | -1.24% | 916 | 4 | |
Broadwater County | 8,293 | 20.89% | 460 | 7 | |
Rosebud County | 8,168 | -1.7% | 1.9K | 2 | |
Valley County | 7,406 | -1.99% | 1.9K | 2 | |
Powell County | 7,188 | 3.54% | 898 | 3 | |
Blaine County | 6,826 | -2.58% | 1.6K | 2 | |
Teton County | 6,514 | 4.19% | 877 | 3 | |
Pondera County | 6,158 | 4.76% | 627 | 4 | |
Chouteau County | 5,786 | -1.92% | 1.5K | 1 | |
Musselshell County | 5,447 | 14.67% | 721 | 3 | |
Toole County | 5,189 | 4.36% | 739 | 3 | |
Mineral County | 5,160 | 12.96% | 471 | 4 | |
Phillips County | 4,270 | 1.35% | 2K | 1 | |
Sweet Grass County | 3,799 | 3.51% | 716 | 2 | |
Granite County | 3,693 | 11.5% | 667 | 2 | |
Sheridan County | 3,441 | -2.8% | 647 | 2 | |
Fallon County | 2,938 | -3% | 626 | 2 | |
Meagher County | 2,116 | 10.21% | 923 | 1 | |
Judith Basin County | 2,107 | 4.31% | 722 | 1 | |
Wheatland County | 2,076 | 0% | 549 | 1 | |
Liberty County | 1,974 | 1.02% | 552 | 1 | |
Powder River County | 1,754 | 3.42% | 1.3K | 1 | |
McCone County | 1,641 | -5.03% | 1K | 1 | |
Daniels County | 1,621 | -2% | 550 | 1 | |
Carter County | 1,433 | 2.07% | 1.3K | 0.43 | |
Garfield County | 1,204 | 2.73% | 1.8K | 0.26 | |
Prairie County | 1,116 | 2.29% | 670 | 1 | |
Wibaux County | 893 | -4.49% | 344 | 1 | |
Golden Valley County | 844 | 2.8% | 453 | 1 | |
Treasure County | 790 | 4.08% | 378 | 1 | |
Petroleum County | 587 | 17.64% | 639 | 0.35 |
There are 56 counties in Montana. The most populous county located in the state of Montana is Yellowstone County, home to Billings, which has a population of 160,137 in 2019. Since the time that the last census was taken in 2010, Yellowstone County has seen an increase in the total population of 7.92%. The only other counties in the state of Montana with a population of more than 100,000 are Missoula County (118,791, Gallatin County (111,876), and Flathead County (102,106). All four counties have experienced substantial population growth of at least 7%; Gallatin County grew the most with a 24.79% growth rate.
The county with the lowest population in the state of Montana is Petroleum County, which has a population of 513 people. Since the last census in 2010, Petroleum County’s population has seen an increase of 4.91%. Following up after Petroleum County, other small counties in Montana include Treasure County (679), Golden Valley County (826), Wibaux County (1,034), and Prairie County (1,087). Of these counties, Petroleum County experienced the most significant growth while Prairie County had the most dramatic decline with a growth rate of -8.11%.
The county with the most significant growth rate in the state of Montana is Gallatin County, which has seen a population growth of 24.79% since the 2010 census was taken, bringing the population up to 111,876 in 2019. Montana has several other counties that have experienced double-digit growth since the census including Madison County (13.91%), Flathead County (12.37%), and Richland County (11.82%). Toole County has seen the lowest population growth, with a loss of 9.17%. )
State | Counties |
---|---|
Texas | 254 |
Georgia | 159 |
Virginia | 133 |
Kentucky | 120 |
Missouri | 115 |
Kansas | 105 |
Illinois | 102 |
North Carolina | 100 |
Iowa | 99 |
Tennessee | 95 |
Nebraska | 93 |
Indiana | 92 |
Ohio | 88 |
Minnesota | 87 |
Michigan | 83 |
Mississippi | 82 |
Puerto Rico | 78 |
Oklahoma | 77 |
Arkansas | 75 |
Wisconsin | 72 |
Alabama | 67 |
Florida | 67 |
Pennsylvania | 67 |
South Dakota | 66 |
Colorado | 64 |
Louisiana | 64 |
New York | 62 |
California | 58 |
Montana | 56 |
West Virginia | 55 |
North Dakota | 53 |
South Carolina | 46 |
Idaho | 44 |
Washington | 39 |
Oregon | 36 |
New Mexico | 33 |
Alaska | 30 |
Utah | 29 |
Maryland | 24 |
Wyoming | 23 |
New Jersey | 21 |
Nevada | 17 |
Maine | 16 |
Arizona | 15 |
Massachusetts | 14 |
Vermont | 14 |
New Hampshire | 10 |
Connecticut | 9 |
Hawaii | 5 |
Rhode Island | 5 |
Delaware | 3 |
District of Columbia | 1 |