State Cancer Profiles

Interpretation of Demographics Data

Demographic Data Report for Montana by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2019-2023 American Community Survey 5-Year Data
Sorted by Count

United States

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Value (Percent) : The value is 22.2 percent.
• People (Age Under 18) : The number of people (age under 18) is 73,645,238.
• Rank within US : N/A

Montana

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Value (Percent) : The value is 21.3 percent.
• People (Age Under 18) : The number of people (age under 18) is 234,942.
• Rank within US : This state is ranked 37 of 52

Yellowstone County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 23.2 percent.
• People (Age Under 18) : The number of people (age under 18) is 38,842.
• Rank within US : This county is ranked 1042 of 3143

Flathead County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 21.8 percent.
• People (Age Under 18) : The number of people (age under 18) is 23,597.
• Rank within US : This county is ranked 1646 of 3143

Gallatin County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 19.2 percent.
• People (Age Under 18) : The number of people (age under 18) is 23,499.
• Rank within US : This county is ranked 2514 of 3143

Missoula County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 18.4 percent.
• People (Age Under 18) : The number of people (age under 18) is 22,072.
• Rank within US : This county is ranked 2684 of 3143

Cascade County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 22.5 percent.
• People (Age Under 18) : The number of people (age under 18) is 19,000.
• Rank within US : This county is ranked 1340 of 3143

Lewis and Clark County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 21.4 percent.
• People (Age Under 18) : The number of people (age under 18) is 15,542.
• Rank within US : This county is ranked 1821 of 3143

Ravalli County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 18.8 percent.
• People (Age Under 18) : The number of people (age under 18) is 8,601.
• Rank within US : This county is ranked 2608 of 3143

Silver Bow County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 20.6 percent.
• People (Age Under 18) : The number of people (age under 18) is 7,334.
• Rank within US : This county is ranked 2123 of 3143

Lake County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 22.6 percent.
• People (Age Under 18) : The number of people (age under 18) is 7,237.
• Rank within US : This county is ranked 1288 of 3143

Hill County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 28.4 percent.
• People (Age Under 18) : The number of people (age under 18) is 4,618.
• Rank within US : This county is ranked 124 of 3143

Big Horn County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 32.4 percent.
• People (Age Under 18) : The number of people (age under 18) is 4,196.
• Rank within US : This county is ranked 33 of 3143

Glacier County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 29.7 percent.
• People (Age Under 18) : The number of people (age under 18) is 4,076.
• Rank within US : This county is ranked 85 of 3143

Lincoln County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 18.0 percent.
• People (Age Under 18) : The number of people (age under 18) is 3,725.
• Rank within US : This county is ranked 2761 of 3143

Roosevelt County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 33.4 percent.
• People (Age Under 18) : The number of people (age under 18) is 3,557.
• Rank within US : This county is ranked 25 of 3143

Park County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 17.0 percent.
• People (Age Under 18) : The number of people (age under 18) is 2,969.
• Rank within US : This county is ranked 2908 of 3143

Richland County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 25.3 percent.
• People (Age Under 18) : The number of people (age under 18) is 2,864.
• Rank within US : This county is ranked 398 of 3143

Jefferson County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 20.2 percent.
• People (Age Under 18) : The number of people (age under 18) is 2,526.
• Rank within US : This county is ranked 2249 of 3143

Fergus County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 20.7 percent.
• People (Age Under 18) : The number of people (age under 18) is 2,403.
• Rank within US : This county is ranked 2085 of 3143

Rosebud County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 28.9 percent.
• People (Age Under 18) : The number of people (age under 18) is 2,384.
• Rank within US : This county is ranked 109 of 3143

Custer County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 19.9 percent.
• People (Age Under 18) : The number of people (age under 18) is 2,381.
• Rank within US : This county is ranked 2329 of 3143

Sanders County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 17.3 percent.
• People (Age Under 18) : The number of people (age under 18) is 2,233.
• Rank within US : This county is ranked 2869 of 3143

Blaine County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 29.4 percent.
• People (Age Under 18) : The number of people (age under 18) is 2,057.
• Rank within US : This county is ranked 92 of 3143

Stillwater County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 21.1 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,908.
• Rank within US : This county is ranked 1936 of 3143

Carbon County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 17.4 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,892.
• Rank within US : This county is ranked 2857 of 3143

Dawson County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 21.1 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,870.
• Rank within US : This county is ranked 1936 of 3143

Valley County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 22.5 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,699.
• Rank within US : This county is ranked 1340 of 3143

Beaverhead County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 17.4 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,667.
• Rank within US : This county is ranked 2857 of 3143

Teton County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 25.0 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,574.
• Rank within US : This county is ranked 468 of 3143

Pondera County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 23.5 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,412.
• Rank within US : This county is ranked 900 of 3143

Madison County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 15.7 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,409.
• Rank within US : This county is ranked 3014 of 3143

Broadwater County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 19.1 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,396.
• Rank within US : This county is ranked 2537 of 3143

Chouteau County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 23.2 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,367.
• Rank within US : This county is ranked 1042 of 3143

Deer Lodge County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 12.4 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,184.
• Rank within US : This county is ranked 3118 of 3143

Powell County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 14.7 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,031.
• Rank within US : This county is ranked 3070 of 3143

Toole County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 20.2 percent.
• People (Age Under 18) : The number of people (age under 18) is 1,015.
• Rank within US : This county is ranked 2249 of 3143

Mineral County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 20.8 percent.
• People (Age Under 18) : The number of people (age under 18) is 999.
• Rank within US : This county is ranked 2044 of 3143

Musselshell County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 19.6 percent.
• People (Age Under 18) : The number of people (age under 18) is 991.
• Rank within US : This county is ranked 2404 of 3143

Phillips County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 23.5 percent.
• People (Age Under 18) : The number of people (age under 18) is 991.
• Rank within US : This county is ranked 900 of 3143

Sheridan County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 21.5 percent.
• People (Age Under 18) : The number of people (age under 18) is 792.
• Rank within US : This county is ranked 1784 of 3143

Sweet Grass County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 20.4 percent.
• People (Age Under 18) : The number of people (age under 18) is 757.
• Rank within US : This county is ranked 2187 of 3143

Fallon County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 25.3 percent.
• People (Age Under 18) : The number of people (age under 18) is 714.
• Rank within US : This county is ranked 398 of 3143

Liberty County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 29.5 percent.
• People (Age Under 18) : The number of people (age under 18) is 580.
• Rank within US : This county is ranked 90 of 3143

Granite County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 15.1 percent.
• People (Age Under 18) : The number of people (age under 18) is 517.
• Rank within US : This county is ranked 3053 of 3143

Judith Basin County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 22.2 percent.
• People (Age Under 18) : The number of people (age under 18) is 456.
• Rank within US : This county is ranked 1469 of 3143

Wheatland County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 21.9 percent.
• People (Age Under 18) : The number of people (age under 18) is 448.
• Rank within US : This county is ranked 1606 of 3143

McCone County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 18.9 percent.
• People (Age Under 18) : The number of people (age under 18) is 344.
• Rank within US : This county is ranked 2581 of 3143

Powder River County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 18.4 percent.
• People (Age Under 18) : The number of people (age under 18) is 325.
• Rank within US : This county is ranked 2684 of 3143

Wibaux County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 28.0 percent.
• People (Age Under 18) : The number of people (age under 18) is 322.
• Rank within US : This county is ranked 136 of 3143

Daniels County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 20.1 percent.
• People (Age Under 18) : The number of people (age under 18) is 307.
• Rank within US : This county is ranked 2274 of 3143

Prairie County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 21.6 percent.
• People (Age Under 18) : The number of people (age under 18) is 270.
• Rank within US : This county is ranked 1725 of 3143

Carter County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 17.6 percent.
• People (Age Under 18) : The number of people (age under 18) is 239.
• Rank within US : This county is ranked 2835 of 3143

Meagher County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 12.0 percent.
• People (Age Under 18) : The number of people (age under 18) is 237.
• Rank within US : This county is ranked 3121 of 3143

Garfield County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 23.6 percent.
• People (Age Under 18) : The number of people (age under 18) is 221.
• Rank within US : This county is ranked 866 of 3143

Golden Valley County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 14.5 percent.
• People (Age Under 18) : The number of people (age under 18) is 122.
• Rank within US : This county is ranked 3079 of 3143

Treasure County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 15.8 percent.
• People (Age Under 18) : The number of people (age under 18) is 120.
• Rank within US : This county is ranked 3008 of 3143

Petroleum County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 13.2 percent.
• People (Age Under 18) : The number of people (age under 18) is 53.
• Rank within US : This county is ranked 3106 of 3143

Notes:
Created by statecancerprofiles.cancer.gov on 07/17/2025 8:42 am.

Φ Rural-Urban Continuum Codes provided by the USDA.

Source: Demographic data provided by the Census Bureau and the American Community Survey.
For more information about Population: Age under 18, see the dictionary.

Data for United States does not include Puerto Rico.