Demographics Table
Demographic Data Report for Montana by County
Population: Age 40 and over
All Races (includes Hispanic), Both Sexes
2020-2024 American Community Survey 5-Year Data
Sorted by Percent
County
|
2023 Rural-Urban Continuum Codes Φ
|
Value (Percent)
|
People (Age 40 And Over)
|
Rank within US (of 3143 counties)
|
|---|---|---|---|---|
| Montana | N/A | 50.6 | 564,875 | 12 of 52 |
| United States | N/A | 48.5 | 162,458,898 | N/A |
| Meagher County | Rural | 70.3 | 1,411 | 17 |
| Petroleum County | Rural | 68.7 | 307 | 31 |
| Granite County | Rural | 67.1 | 2,323 | 45 |
| Sanders County | Rural | 65.4 | 8,694 | 65 |
| Prairie County | Rural | 64.6 | 807 | 85 |
| Carter County | Rural | 64.1 | 839 | 99 |
| Lincoln County | Rural | 63.7 | 13,484 | 111 |
| Daniels County | Rural | 63.3 | 945 | 125 |
| Madison County | Rural | 63.3 | 5,837 | 125 |
| McCone County | Rural | 62.3 | 1,041 | 158 |
| Musselshell County | Rural | 62.0 | 3,192 | 167 |
| Deer Lodge County | Rural | 61.9 | 5,936 | 173 |
| Carbon County | Urban | 61.5 | 6,834 | 192 |
| Treasure County | Rural | 60.1 | 440 | 258 |
| Ravalli County | Rural | 59.9 | 27,989 | 276 |
| Golden Valley County | Rural | 58.8 | 529 | 363 |
| Park County | Rural | 58.6 | 10,378 | 378 |
| Phillips County | Rural | 58.6 | 2,474 | 378 |
| Mineral County | Urban | 58.5 | 2,899 | 389 |
| Broadwater County | Urban | 58.3 | 4,470 | 415 |
| Powell County | Rural | 58.2 | 4,104 | 420 |
| Stillwater County | Urban | 58.0 | 5,323 | 446 |
| Powder River County | Rural | 57.7 | 1,048 | 473 |
| Judith Basin County | Rural | 57.5 | 1,190 | 497 |
| Jefferson County | Urban | 57.4 | 7,331 | 515 |
| Sweet Grass County | Rural | 57.2 | 2,126 | 542 |
| Wheatland County | Rural | 55.9 | 1,149 | 695 |
| Valley County | Rural | 55.1 | 4,142 | 836 |
| Fergus County | Rural | 54.8 | 6,401 | 888 |
| Lake County | Rural | 54.8 | 17,832 | 888 |
| Custer County | Rural | 54.7 | 6,538 | 909 |
| Sheridan County | Rural | 54.5 | 2,001 | 952 |
| Garfield County | Rural | 53.7 | 587 | 1,138 |
| Flathead County | Rural | 53.2 | 58,926 | 1,245 |
| Beaverhead County | Rural | 52.8 | 5,132 | 1,325 |
| Lewis and Clark County | Urban | 52.5 | 38,542 | 1,412 |
| Teton County | Rural | 52.5 | 3,336 | 1,412 |
| Chouteau County | Rural | 52.2 | 3,084 | 1,488 |
| Dawson County | Rural | 52.1 | 4,601 | 1,510 |
| Pondera County | Rural | 51.9 | 3,133 | 1,570 |
| Wibaux County | Rural | 51.0 | 608 | 1,793 |
| Silver Bow County | Rural | 50.5 | 18,081 | 1,912 |
| Liberty County | Rural | 49.5 | 966 | 2,137 |
| Yellowstone County | Urban | 48.7 | 82,329 | 2,309 |
| Cascade County | Urban | 48.6 | 41,079 | 2,326 |
| Toole County | Rural | 48.5 | 2,457 | 2,339 |
| Richland County | Rural | 48.0 | 5,396 | 2,419 |
| Rosebud County | Rural | 47.3 | 3,858 | 2,512 |
| Fallon County | Rural | 46.9 | 1,295 | 2,568 |
| Missoula County | Urban | 45.7 | 55,122 | 2,705 |
| Blaine County | Rural | 44.2 | 3,074 | 2,824 |
| Hill County | Rural | 43.2 | 6,984 | 2,894 |
| Gallatin County | Urban | 41.5 | 51,528 | 2,962 |
| Big Horn County | Rural | 41.0 | 5,282 | 2,988 |
| Glacier County | Rural | 40.9 | 5,575 | 2,995 |
| Roosevelt County | Rural | 36.9 | 3,886 | 3,101 |
Notes:
Created by statecancerprofiles.cancer.gov on 03/29/2026 9:28 am.
Φ Rural–urban county classifications are based on the 2023 USDA Rural–Urban Continuum Codes (except for Connecticut Counties which use 2013 codes). State-level cancer rates for rural areas are calculated using cancer cases registered exclusively in rural counties, while state-level cancer rates for urban areas are calculated using cases registered exclusively in urban counties.
Source: Demographic data provided by the Census Bureau and the American Community Survey.
For more information about Population: Age 40 and over, see the dictionary.
Data for United States does not include Puerto Rico.