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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 Rank
County
 sort alphabetically by name ascending
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
Davis County 29.7 2,691 101
Lyon County 28.4 3,392 142
Dallas County 27.5 26,545 184
Sioux County 27.4 9,759 197
Buchanan County 26.4 5,430 290
Buena Vista County 26.2 5,430 309
Woodbury County 26.2 27,491 316
Clarke County 26.2 2,546 317
Wayne County 25.9 1,684 351
Howard County 25.6 2,418 411
Marshall County 25.6 10,257 414
Madison County 25.5 4,179 431
Crawford County 25.4 4,210 438
Plymouth County 25.2 6,441 480
Washington County 24.9 5,616 535
Polk County 24.9 121,827 538
Muscatine County 24.9 10,737 550
Ida County 24.8 1,733 563
Wright County 24.8 3,221 567
Warren County 24.8 12,858 570
Monroe County 24.4 1,853 678
Montgomery County 24.4 2,515 693
Tama County 24.3 4,154 706
Ringgold County 24.2 1,149 724
Mitchell County 24.1 2,537 779
O'Brien County 24.1 3,405 786
Delaware County 24.0 4,210 796
Mahaska County 24.0 5,316 802
Carroll County 24.0 4,981 811
Humboldt County 24.0 2,308 817
Chickasaw County 23.9 2,872 868
Scott County 23.9 41,552 882
Allamakee County 23.8 3,351 903
Pottawattamie County 23.7 22,184 949
Osceola County 23.7 1,462 951
Palo Alto County 23.7 2,131 958
Mills County 23.6 3,457 995
Grundy County 23.5 2,903 1,013
Harrison County 23.5 3,423 1,040
Franklin County 23.5 2,359 1,045
Marion County 23.5 7,829 1,048
Benton County 23.5 6,016 1,051
Clay County 23.4 3,847 1,054
Taylor County 23.4 1,388 1,077
Linn County 23.3 53,295 1,113
Wapello County 23.3 8,221 1,144
Van Buren County 23.2 1,671 1,158
Iowa County 23.2 3,851 1,163
Keokuk County 23.1 2,322 1,203
Butler County 23.0 3,323 1,231
Hamilton County 23.0 3,464 1,257
Bremer County 22.9 5,701 1,277
Dubuque County 22.9 22,618 1,283
Floyd County 22.9 3,591 1,286
Appanoose County 22.9 2,816 1,305
Clinton County 22.8 10,645 1,318
Des Moines County 22.8 8,908 1,337
Fremont County 22.8 1,528 1,338
Cass County 22.8 2,998 1,344
Lucas County 22.7 1,964 1,386
Cherokee County 22.7 2,629 1,415
Union County 22.6 2,761 1,418
Louisa County 22.6 2,466 1,419
Pocahontas County 22.6 1,604 1,428
Greene County 22.6 1,997 1,432
Calhoun County 22.4 2,236 1,481
Jasper County 22.4 8,442 1,501
Adair County 22.4 1,663 1,522
Monona County 22.3 1,950 1,536
Sac County 22.3 2,193 1,544
Audubon County 22.3 1,259 1,571
Kossuth County 22.2 3,297 1,577
Guthrie County 22.2 2,356 1,586
Jackson County 22.2 4,324 1,608
Winnebago County 22.2 2,382 1,610
Cedar County 22.1 4,092 1,625
Shelby County 22.0 2,586 1,672
Black Hawk County 22.0 28,843 1,705
Hancock County 21.8 2,367 1,757
Decatur County 21.8 1,684 1,771
Jones County 21.8 4,498 1,801
Clayton County 21.7 3,731 1,807
Lee County 21.6 7,301 1,850
Henry County 21.6 4,433 1,857
Boone County 21.6 5,780 1,859
Adams County 21.5 794 1,921
Webster County 21.5 7,967 1,928
Fayette County 21.4 4,183 1,961
Cerro Gordo County 21.0 9,086 2,072
Worth County 20.7 1,542 2,176
Emmet County 20.5 1,935 2,239
Jefferson County 20.2 3,206 2,331
Poweshiek County 20.0 3,733 2,390
Johnson County 20.0 30,374 2,405
Page County 19.9 3,041 2,427
Hardin County 19.9 3,378 2,445
Dickinson County 19.5 3,423 2,531
Winneshiek County 18.6 3,740 2,734
Story County 16.6 16,316 2,982
Notes:
Created by statecancerprofiles.cancer.gov on 04/20/2024 4:48 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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