State Cancer Profiles

Interpretation of Demographics Data

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

Montana

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Value (Percent) : The value is 50.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 564,875.
• Rank within US : This county is ranked 12 of 52

United States

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Value (Percent) : The value is 48.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 162,458,898.
• Rank within US : N/A

Petroleum County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 68.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 307.
• Rank within US : This county is ranked 31 of 3143

Treasure County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 60.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 440.
• Rank within US : This county is ranked 258 of 3143

Golden Valley County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 58.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 529.
• Rank within US : This county is ranked 363 of 3143

Garfield County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 53.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 587.
• Rank within US : This county is ranked 1138 of 3143

Wibaux County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 51.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 608.
• Rank within US : This county is ranked 1793 of 3143

Prairie County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 64.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 807.
• Rank within US : This county is ranked 85 of 3143

Carter County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 64.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 839.
• Rank within US : This county is ranked 99 of 3143

Daniels County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 63.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 945.
• Rank within US : This county is ranked 125 of 3143

Liberty County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 49.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 966.
• Rank within US : This county is ranked 2137 of 3143

McCone County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 62.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 1,041.
• Rank within US : This county is ranked 158 of 3143

Powder River County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 57.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 1,048.
• Rank within US : This county is ranked 473 of 3143

Wheatland County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 1,149.
• Rank within US : This county is ranked 695 of 3143

Judith Basin County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 57.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 1,190.
• Rank within US : This county is ranked 497 of 3143

Fallon County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 46.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 1,295.
• Rank within US : This county is ranked 2568 of 3143

Meagher County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 70.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 1,411.
• Rank within US : This county is ranked 17 of 3143

Sheridan County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 54.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,001.
• Rank within US : This county is ranked 952 of 3143

Sweet Grass County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 57.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,126.
• Rank within US : This county is ranked 542 of 3143

Granite County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 67.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,323.
• Rank within US : This county is ranked 45 of 3143

Toole County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 48.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,457.
• Rank within US : This county is ranked 2339 of 3143

Phillips County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 58.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,474.
• Rank within US : This county is ranked 378 of 3143

Mineral County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 58.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 2,899.
• Rank within US : This county is ranked 389 of 3143

Blaine County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 44.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 3,074.
• Rank within US : This county is ranked 2824 of 3143

Chouteau County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 3,084.
• Rank within US : This county is ranked 1488 of 3143

Pondera County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 51.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 3,133.
• Rank within US : This county is ranked 1570 of 3143

Musselshell County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 62.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 3,192.
• Rank within US : This county is ranked 167 of 3143

Teton County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 3,336.
• Rank within US : This county is ranked 1412 of 3143

Rosebud County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 47.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 3,858.
• Rank within US : This county is ranked 2512 of 3143

Roosevelt County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 36.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 3,886.
• Rank within US : This county is ranked 3101 of 3143

Powell County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 58.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 4,104.
• Rank within US : This county is ranked 420 of 3143

Valley County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 55.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 4,142.
• Rank within US : This county is ranked 836 of 3143

Broadwater County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 58.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 4,470.
• Rank within US : This county is ranked 415 of 3143

Dawson County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.1 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 4,601.
• Rank within US : This county is ranked 1510 of 3143

Beaverhead County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 52.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 5,132.
• Rank within US : This county is ranked 1325 of 3143

Big Horn County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 41.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 5,282.
• Rank within US : This county is ranked 2988 of 3143

Stillwater County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 58.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 5,323.
• Rank within US : This county is ranked 446 of 3143

Richland County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 48.0 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 5,396.
• Rank within US : This county is ranked 2419 of 3143

Glacier County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 40.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 5,575.
• Rank within US : This county is ranked 2995 of 3143

Madison County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 63.3 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 5,837.
• Rank within US : This county is ranked 125 of 3143

Deer Lodge County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 61.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 5,936.
• Rank within US : This county is ranked 173 of 3143

Fergus County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 54.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,401.
• Rank within US : This county is ranked 888 of 3143

Custer County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 54.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,538.
• Rank within US : This county is ranked 909 of 3143

Carbon County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 61.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,834.
• Rank within US : This county is ranked 192 of 3143

Hill County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 43.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 6,984.
• Rank within US : This county is ranked 2894 of 3143

Jefferson County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 57.4 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 7,331.
• Rank within US : This county is ranked 515 of 3143

Sanders County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 65.4 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 8,694.
• Rank within US : This county is ranked 65 of 3143

Park County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 58.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 10,378.
• Rank within US : This county is ranked 378 of 3143

Lincoln County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 63.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 13,484.
• Rank within US : This county is ranked 111 of 3143

Lake County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 54.8 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 17,832.
• Rank within US : This county is ranked 888 of 3143

Silver Bow County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 50.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 18,081.
• Rank within US : This county is ranked 1912 of 3143

Ravalli County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 59.9 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 27,989.
• Rank within US : This county is ranked 276 of 3143

Lewis and Clark County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 52.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 38,542.
• Rank within US : This county is ranked 1412 of 3143

Cascade County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 48.6 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 41,079.
• Rank within US : This county is ranked 2326 of 3143

Gallatin County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 41.5 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 51,528.
• Rank within US : This county is ranked 2962 of 3143

Missoula County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 45.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 55,122.
• Rank within US : This county is ranked 2705 of 3143

Flathead County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 53.2 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 58,926.
• Rank within US : This county is ranked 1245 of 3143

Yellowstone County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 48.7 percent.
• People (Age 40 And Over) : The number of people (age 40 and over) is 82,329.
• Rank within US : This county is ranked 2309 of 3143

Notes:
Created by statecancerprofiles.cancer.gov on 03/24/2026 1:50 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.