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Demographic Data Report for Montana by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2014-2018 American Community Survey 5-Year Data
Sorted by Value
County
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Value (Percent)
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People (Age Under 18)
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Rank within US
(of 3141 counties)
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Montana 21.8 227,592 37 of 52
United States 22.8 73,553,240 N/A
Powell County 14.7 1,007 3,103
Powder River County 15.5 251 3,070
Madison County 15.5 1,276 3,069
Deer Lodge County 15.6 1,420 3,066
Granite County 17.3 565 2,947
Golden Valley County 17.8 129 2,897
Sanders County 17.9 2,067 2,877
Judith Basin County 18.0 351 2,871
Mineral County 18.0 760 2,863
Carbon County 18.2 1,916 2,846
Lincoln County 18.2 3,531 2,832
Beaverhead County 18.4 1,733 2,807
Park County 18.6 3,023 2,776
Missoula County 19.1 22,206 2,671
Carter County 19.5 257 2,577
Toole County 19.6 977 2,541
Broadwater County 19.7 1,148 2,527
Treasure County 19.7 153 2,526
Ravalli County 19.7 8,257 2,525
Petroleum County 19.9 86 2,469
Meagher County 20.0 393 2,461
McCone County 20.2 329 2,390
Silver Bow County 20.2 7,028 2,387
Gallatin County 20.3 21,220 2,365
Fergus County 20.4 2,300 2,326
Daniels County 20.8 364 2,208
Jefferson County 20.9 2,466 2,139
Sweet Grass County 21.0 766 2,123
Musselshell County 21.0 1,011 2,103
Garfield County 21.0 240 2,102
Sheridan County 21.1 754 2,085
Dawson County 21.4 1,964 1,994
Liberty County 21.7 494 1,878
Lewis and Clark County 21.7 14,572 1,846
Stillwater County 21.8 2,050 1,812
Custer County 21.9 2,590 1,776
Valley County 21.9 1,647 1,774
Flathead County 22.3 21,826 1,600
Cascade County 22.5 18,379 1,513
Phillips County 23.5 970 1,043
Prairie County 23.5 316 1,036
Yellowstone County 23.6 37,221 1,022
Teton County 23.7 1,443 966
Fallon County 23.7 674 960
Chouteau County 23.8 1,378 935
Lake County 24.1 7,174 797
Richland County 24.2 2,747 766
Wheatland County 24.3 522 727
Pondera County 25.2 1,524 492
Hill County 27.5 4,526 184
Wibaux County 28.6 336 135
Rosebud County 29.4 2,715 103
Blaine County 29.9 2,009 90
Glacier County 31.6 4,329 55
Roosevelt County 33.0 3,708 34
Big Horn County 33.6 4,494 29
Notes:
Created by statecancerprofiles.cancer.gov on 04/20/2021 9:19 pm.
Source: Demographic data provided by the Census Bureau and the American Community Survey.
For more information about Population: Age under 18, see the dictionary.
Health Service Areas are a single county or cluster of contiguous counties which are relatively self-contained with respect to hospital care. For more detailed information, please see Health Service Area information page. Puerto Rico is being treated as a Health Service Area for this data presentation.
Data for United States does not include Puerto Rico.

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