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Demographics Table

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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 Value

County
 sort alphabetically by name ascending
2023 Rural-Urban Continuum Codes Φ
 sort by rural urban descending
Value (Percent)
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People (Age Under 18)
 sort by sample size ascending
Rank within US
(of 3143 counties)
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United States N/A 22.2 73,645,238 N/A
Montana N/A 21.3 234,942 37 of 52
Roosevelt County Rural 33.4 3,557 25
Big Horn County Rural 32.4 4,196 33
Glacier County Rural 29.7 4,076 85
Liberty County Rural 29.5 580 90
Blaine County Rural 29.4 2,057 92
Rosebud County Rural 28.9 2,384 109
Hill County Rural 28.4 4,618 124
Wibaux County Rural 28.0 322 136
Fallon County Rural 25.3 714 398
Richland County Rural 25.3 2,864 398
Teton County Rural 25.0 1,574 468
Garfield County Rural 23.6 221 866
Phillips County Rural 23.5 991 900
Pondera County Rural 23.5 1,412 900
Chouteau County Rural 23.2 1,367 1,042
Yellowstone County Urban 23.2 38,842 1,042
Lake County Rural 22.6 7,237 1,288
Cascade County Urban 22.5 19,000 1,340
Valley County Rural 22.5 1,699 1,340
Judith Basin County Rural 22.2 456 1,469
Wheatland County Rural 21.9 448 1,606
Flathead County Rural 21.8 23,597 1,646
Prairie County Rural 21.6 270 1,725
Sheridan County Rural 21.5 792 1,784
Lewis and Clark County Urban 21.4 15,542 1,821
Dawson County Rural 21.1 1,870 1,936
Stillwater County Urban 21.1 1,908 1,936
Mineral County Urban 20.8 999 2,044
Fergus County Rural 20.7 2,403 2,085
Silver Bow County Rural 20.6 7,334 2,123
Sweet Grass County Rural 20.4 757 2,187
Jefferson County Urban 20.2 2,526 2,249
Toole County Rural 20.2 1,015 2,249
Daniels County Rural 20.1 307 2,274
Custer County Rural 19.9 2,381 2,329
Musselshell County Rural 19.6 991 2,404
Gallatin County Urban 19.2 23,499 2,514
Broadwater County Urban 19.1 1,396 2,537
McCone County Rural 18.9 344 2,581
Ravalli County Rural 18.8 8,601 2,608
Missoula County Urban 18.4 22,072 2,684
Powder River County Rural 18.4 325 2,684
Lincoln County Rural 18.0 3,725 2,761
Carter County Rural 17.6 239 2,835
Beaverhead County Rural 17.4 1,667 2,857
Carbon County Urban 17.4 1,892 2,857
Sanders County Rural 17.3 2,233 2,869
Park County Rural 17.0 2,969 2,908
Treasure County Rural 15.8 120 3,008
Madison County Rural 15.7 1,409 3,014
Granite County Rural 15.1 517 3,053
Powell County Rural 14.7 1,031 3,070
Golden Valley County Rural 14.5 122 3,079
Petroleum County Rural 13.2 53 3,106
Deer Lodge County Rural 12.4 1,184 3,118
Meagher County Rural 12.0 237 3,121
Notes:
Created by statecancerprofiles.cancer.gov on 07/07/2025 1:47 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.

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