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Demographic Data Report for Iowa by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2015-2019 American Community Survey 5-Year Data
Sorted by Value
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 3146 counties)
 sort by rank ascending
United States 22.6 73,429,392 N/A
Iowa 23.2 728,737 18 of 52
Jefferson County 15.8 2,867 3,051
Story County 16.6 16,104 2,990
Winneshiek County 18.5 3,750 2,763
Dickinson County 18.9 3,236 2,697
Poweshiek County 19.6 3,596 2,522
Page County 19.9 3,045 2,424
Johnson County 20.1 29,819 2,397
Monona County 20.5 1,786 2,274
Audubon County 20.6 1,146 2,224
Cerro Gordo County 20.6 8,813 2,222
Emmet County 20.8 1,959 2,166
Adams County 20.9 767 2,124
Fayette County 21.0 4,149 2,099
Worth County 21.0 1,561 2,097
Hardin County 21.0 3,582 2,090
Calhoun County 21.2 2,063 2,032
Webster County 21.3 7,768 1,999
Clayton County 21.3 3,758 1,977
Jones County 21.4 4,391 1,966
Adair County 21.4 1,519 1,922
Cherokee County 21.5 2,437 1,905
Pocahontas County 21.6 1,465 1,870
Black Hawk County 21.7 28,685 1,816
Winnebago County 21.7 2,286 1,796
Boone County 21.7 5,724 1,792
Decatur County 21.7 1,735 1,775
Lee County 21.8 7,448 1,767
Fremont County 21.8 1,512 1,766
Henry County 21.9 4,360 1,733
Appanoose County 21.9 2,733 1,699
Kossuth County 22.0 3,293 1,683
Hancock County 22.1 2,388 1,635
Cass County 22.2 2,906 1,595
Jackson County 22.2 4,312 1,578
Bremer County 22.3 5,538 1,561
Shelby County 22.3 2,587 1,545
Sac County 22.3 2,188 1,530
Jasper County 22.4 8,275 1,503
Union County 22.5 2,775 1,472
Floyd County 22.6 3,562 1,432
Clay County 22.6 3,661 1,419
Louisa County 22.6 2,528 1,409
Des Moines County 22.7 8,929 1,383
Wapello County 22.7 7,987 1,350
Guthrie County 22.8 2,431 1,335
Clinton County 22.8 10,689 1,334
Keokuk County 22.8 2,322 1,329
Greene County 22.8 2,042 1,312
Chickasaw County 22.9 2,752 1,281
Montgomery County 22.9 2,301 1,279
Hamilton County 22.9 3,433 1,278
Dubuque County 22.9 22,203 1,275
Iowa County 23.0 3,720 1,240
Harrison County 23.0 3,238 1,237
Grundy County 23.1 2,835 1,205
Cedar County 23.1 4,255 1,200
Franklin County 23.1 2,343 1,193
Allamakee County 23.1 3,194 1,173
Lucas County 23.2 1,988 1,158
Taylor County 23.3 1,435 1,110
Butler County 23.3 3,408 1,097
Humboldt County 23.3 2,227 1,090
Van Buren County 23.3 1,669 1,071
Marion County 23.3 7,744 1,068
Osceola County 23.4 1,416 1,052
Mitchell County 23.4 2,484 1,046
Ida County 23.5 1,619 1,032
Linn County 23.5 52,610 1,023
Pottawattamie County 23.5 21,991 1,003
Monroe County 23.6 1,840 994
Benton County 23.6 6,052 979
Palo Alto County 23.7 2,130 963
O'Brien County 23.7 3,279 942
Scott County 23.9 41,147 851
Mills County 23.9 3,597 823
Delaware County 24.0 4,120 805
Mahaska County 24.0 5,316 803
Wright County 24.0 3,057 797
Tama County 24.0 4,096 785
Ringgold County 24.1 1,198 754
Carroll County 24.5 4,968 646
Clarke County 24.6 2,301 625
Washington County 24.7 5,466 587
Madison County 24.8 3,963 581
Warren County 24.8 12,423 564
Crawford County 24.8 4,228 560
Muscatine County 24.9 10,700 534
Plymouth County 25.0 6,258 528
Polk County 25.0 119,828 520
Wayne County 25.2 1,618 479
Marshall County 25.2 10,064 477
Howard County 25.4 2,339 448
Buena Vista County 25.9 5,194 354
Woodbury County 26.2 26,845 320
Buchanan County 26.7 5,649 247
Sioux County 27.1 9,432 211
Dallas County 27.9 24,336 150
Lyon County 28.3 3,330 140
Davis County 29.4 2,621 106
Notes:
Created by statecancerprofiles.cancer.gov on 12/06/2021 7:32 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.
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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