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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 Name
County
 sort alphabetically by name descending
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
Iowa 23.3 742,175 15 of 52
United States 22.5 74,234,075 N/A
Adair County 22.4 1,663 1,522
Adams County 21.5 794 1,921
Allamakee County 23.8 3,351 903
Appanoose County 22.9 2,816 1,305
Audubon County 22.3 1,259 1,571
Benton County 23.5 6,016 1,051
Black Hawk County 22.0 28,843 1,705
Boone County 21.6 5,780 1,859
Bremer County 22.9 5,701 1,277
Buchanan County 26.4 5,430 290
Buena Vista County 26.2 5,430 309
Butler County 23.0 3,323 1,231
Calhoun County 22.4 2,236 1,481
Carroll County 24.0 4,981 811
Cass County 22.8 2,998 1,344
Cedar County 22.1 4,092 1,625
Cerro Gordo County 21.0 9,086 2,072
Cherokee County 22.7 2,629 1,415
Chickasaw County 23.9 2,872 868
Clarke County 26.2 2,546 317
Clay County 23.4 3,847 1,054
Clayton County 21.7 3,731 1,807
Clinton County 22.8 10,645 1,318
Crawford County 25.4 4,210 438
Dallas County 27.5 26,545 184
Davis County 29.7 2,691 101
Decatur County 21.8 1,684 1,771
Delaware County 24.0 4,210 796
Des Moines County 22.8 8,908 1,337
Dickinson County 19.5 3,423 2,531
Dubuque County 22.9 22,618 1,283
Emmet County 20.5 1,935 2,239
Fayette County 21.4 4,183 1,961
Floyd County 22.9 3,591 1,286
Franklin County 23.5 2,359 1,045
Fremont County 22.8 1,528 1,338
Greene County 22.6 1,997 1,432
Grundy County 23.5 2,903 1,013
Guthrie County 22.2 2,356 1,586
Hamilton County 23.0 3,464 1,257
Hancock County 21.8 2,367 1,757
Hardin County 19.9 3,378 2,445
Harrison County 23.5 3,423 1,040
Henry County 21.6 4,433 1,857
Howard County 25.6 2,418 411
Humboldt County 24.0 2,308 817
Ida County 24.8 1,733 563
Iowa County 23.2 3,851 1,163
Jackson County 22.2 4,324 1,608
Jasper County 22.4 8,442 1,501
Jefferson County 20.2 3,206 2,331
Johnson County 20.0 30,374 2,405
Jones County 21.8 4,498 1,801
Keokuk County 23.1 2,322 1,203
Kossuth County 22.2 3,297 1,577
Lee County 21.6 7,301 1,850
Linn County 23.3 53,295 1,113
Louisa County 22.6 2,466 1,419
Lucas County 22.7 1,964 1,386
Lyon County 28.4 3,392 142
Madison County 25.5 4,179 431
Mahaska County 24.0 5,316 802
Marion County 23.5 7,829 1,048
Marshall County 25.6 10,257 414
Mills County 23.6 3,457 995
Mitchell County 24.1 2,537 779
Monona County 22.3 1,950 1,536
Monroe County 24.4 1,853 678
Montgomery County 24.4 2,515 693
Muscatine County 24.9 10,737 550
O'Brien County 24.1 3,405 786
Osceola County 23.7 1,462 951
Page County 19.9 3,041 2,427
Palo Alto County 23.7 2,131 958
Plymouth County 25.2 6,441 480
Pocahontas County 22.6 1,604 1,428
Polk County 24.9 121,827 538
Pottawattamie County 23.7 22,184 949
Poweshiek County 20.0 3,733 2,390
Ringgold County 24.2 1,149 724
Sac County 22.3 2,193 1,544
Scott County 23.9 41,552 882
Shelby County 22.0 2,586 1,672
Sioux County 27.4 9,759 197
Story County 16.6 16,316 2,982
Tama County 24.3 4,154 706
Taylor County 23.4 1,388 1,077
Union County 22.6 2,761 1,418
Van Buren County 23.2 1,671 1,158
Wapello County 23.3 8,221 1,144
Warren County 24.8 12,858 570
Washington County 24.9 5,616 535
Wayne County 25.9 1,684 351
Webster County 21.5 7,967 1,928
Winnebago County 22.2 2,382 1,610
Winneshiek County 18.6 3,740 2,734
Woodbury County 26.2 27,491 316
Worth County 20.7 1,542 2,176
Wright County 24.8 3,221 567
Notes:
Created by statecancerprofiles.cancer.gov on 03/02/2024 4:39 am.
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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