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Demographics Table

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Demographic Data Report for Iowa by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2017-2021 American Community Survey 5-Year Data
Sorted by Count
County
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Value (Percent)
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People (Age Under 18)
 sort by sample size ascending
Rank within US
(of 3143 counties)
 sort by rank ascending
United States 22.5 74,234,075 N/A
Iowa 23.3 742,175 15 of 52
Polk County 24.9 121,827 538
Linn County 23.3 53,295 1,113
Scott County 23.9 41,552 882
Johnson County 20.0 30,374 2,405
Black Hawk County 22.0 28,843 1,705
Woodbury County 26.2 27,491 316
Dallas County 27.5 26,545 184
Dubuque County 22.9 22,618 1,283
Pottawattamie County 23.7 22,184 949
Story County 16.6 16,316 2,982
Warren County 24.8 12,858 570
Muscatine County 24.9 10,737 550
Clinton County 22.8 10,645 1,318
Marshall County 25.6 10,257 414
Sioux County 27.4 9,759 197
Cerro Gordo County 21.0 9,086 2,072
Des Moines County 22.8 8,908 1,337
Jasper County 22.4 8,442 1,501
Wapello County 23.3 8,221 1,144
Webster County 21.5 7,967 1,928
Marion County 23.5 7,829 1,048
Lee County 21.6 7,301 1,850
Plymouth County 25.2 6,441 480
Benton County 23.5 6,016 1,051
Boone County 21.6 5,780 1,859
Bremer County 22.9 5,701 1,277
Washington County 24.9 5,616 535
Buchanan County 26.4 5,430 290
Buena Vista County 26.2 5,430 309
Mahaska County 24.0 5,316 802
Carroll County 24.0 4,981 811
Jones County 21.8 4,498 1,801
Henry County 21.6 4,433 1,857
Jackson County 22.2 4,324 1,608
Crawford County 25.4 4,210 438
Delaware County 24.0 4,210 796
Fayette County 21.4 4,183 1,961
Madison County 25.5 4,179 431
Tama County 24.3 4,154 706
Cedar County 22.1 4,092 1,625
Iowa County 23.2 3,851 1,163
Clay County 23.4 3,847 1,054
Winneshiek County 18.6 3,740 2,734
Poweshiek County 20.0 3,733 2,390
Clayton County 21.7 3,731 1,807
Floyd County 22.9 3,591 1,286
Hamilton County 23.0 3,464 1,257
Mills County 23.6 3,457 995
Dickinson County 19.5 3,423 2,531
Harrison County 23.5 3,423 1,040
O'Brien County 24.1 3,405 786
Lyon County 28.4 3,392 142
Hardin County 19.9 3,378 2,445
Allamakee County 23.8 3,351 903
Butler County 23.0 3,323 1,231
Kossuth County 22.2 3,297 1,577
Wright County 24.8 3,221 567
Jefferson County 20.2 3,206 2,331
Page County 19.9 3,041 2,427
Cass County 22.8 2,998 1,344
Grundy County 23.5 2,903 1,013
Chickasaw County 23.9 2,872 868
Appanoose County 22.9 2,816 1,305
Union County 22.6 2,761 1,418
Davis County 29.7 2,691 101
Cherokee County 22.7 2,629 1,415
Shelby County 22.0 2,586 1,672
Clarke County 26.2 2,546 317
Mitchell County 24.1 2,537 779
Montgomery County 24.4 2,515 693
Louisa County 22.6 2,466 1,419
Howard County 25.6 2,418 411
Winnebago County 22.2 2,382 1,610
Hancock County 21.8 2,367 1,757
Franklin County 23.5 2,359 1,045
Guthrie County 22.2 2,356 1,586
Keokuk County 23.1 2,322 1,203
Humboldt County 24.0 2,308 817
Calhoun County 22.4 2,236 1,481
Sac County 22.3 2,193 1,544
Palo Alto County 23.7 2,131 958
Greene County 22.6 1,997 1,432
Lucas County 22.7 1,964 1,386
Monona County 22.3 1,950 1,536
Emmet County 20.5 1,935 2,239
Monroe County 24.4 1,853 678
Ida County 24.8 1,733 563
Decatur County 21.8 1,684 1,771
Wayne County 25.9 1,684 351
Van Buren County 23.2 1,671 1,158
Adair County 22.4 1,663 1,522
Pocahontas County 22.6 1,604 1,428
Worth County 20.7 1,542 2,176
Fremont County 22.8 1,528 1,338
Osceola County 23.7 1,462 951
Taylor County 23.4 1,388 1,077
Audubon County 22.3 1,259 1,571
Ringgold County 24.2 1,149 724
Adams County 21.5 794 1,921
Notes:
Created by statecancerprofiles.cancer.gov on 04/24/2024 8:54 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.
Data for United States does not include Puerto Rico.

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