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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 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 3146 counties)
 sort by rank ascending
Iowa 23.2 728,737 18 of 52
United States 22.6 73,429,392 N/A
Adair County 21.4 1,519 1,922
Adams County 20.9 767 2,124
Allamakee County 23.1 3,194 1,173
Appanoose County 21.9 2,733 1,699
Audubon County 20.6 1,146 2,224
Benton County 23.6 6,052 979
Black Hawk County 21.7 28,685 1,816
Boone County 21.7 5,724 1,792
Bremer County 22.3 5,538 1,561
Buchanan County 26.7 5,649 247
Buena Vista County 25.9 5,194 354
Butler County 23.3 3,408 1,097
Calhoun County 21.2 2,063 2,032
Carroll County 24.5 4,968 646
Cass County 22.2 2,906 1,595
Cedar County 23.1 4,255 1,200
Cerro Gordo County 20.6 8,813 2,222
Cherokee County 21.5 2,437 1,905
Chickasaw County 22.9 2,752 1,281
Clarke County 24.6 2,301 625
Clay County 22.6 3,661 1,419
Clayton County 21.3 3,758 1,977
Clinton County 22.8 10,689 1,334
Crawford County 24.8 4,228 560
Dallas County 27.9 24,336 150
Davis County 29.4 2,621 106
Decatur County 21.7 1,735 1,775
Delaware County 24.0 4,120 805
Des Moines County 22.7 8,929 1,383
Dickinson County 18.9 3,236 2,697
Dubuque County 22.9 22,203 1,275
Emmet County 20.8 1,959 2,166
Fayette County 21.0 4,149 2,099
Floyd County 22.6 3,562 1,432
Franklin County 23.1 2,343 1,193
Fremont County 21.8 1,512 1,766
Greene County 22.8 2,042 1,312
Grundy County 23.1 2,835 1,205
Guthrie County 22.8 2,431 1,335
Hamilton County 22.9 3,433 1,278
Hancock County 22.1 2,388 1,635
Hardin County 21.0 3,582 2,090
Harrison County 23.0 3,238 1,237
Henry County 21.9 4,360 1,733
Howard County 25.4 2,339 448
Humboldt County 23.3 2,227 1,090
Ida County 23.5 1,619 1,032
Iowa County 23.0 3,720 1,240
Jackson County 22.2 4,312 1,578
Jasper County 22.4 8,275 1,503
Jefferson County 15.8 2,867 3,051
Johnson County 20.1 29,819 2,397
Jones County 21.4 4,391 1,966
Keokuk County 22.8 2,322 1,329
Kossuth County 22.0 3,293 1,683
Lee County 21.8 7,448 1,767
Linn County 23.5 52,610 1,023
Louisa County 22.6 2,528 1,409
Lucas County 23.2 1,988 1,158
Lyon County 28.3 3,330 140
Madison County 24.8 3,963 581
Mahaska County 24.0 5,316 803
Marion County 23.3 7,744 1,068
Marshall County 25.2 10,064 477
Mills County 23.9 3,597 823
Mitchell County 23.4 2,484 1,046
Monona County 20.5 1,786 2,274
Monroe County 23.6 1,840 994
Montgomery County 22.9 2,301 1,279
Muscatine County 24.9 10,700 534
O'Brien County 23.7 3,279 942
Osceola County 23.4 1,416 1,052
Page County 19.9 3,045 2,424
Palo Alto County 23.7 2,130 963
Plymouth County 25.0 6,258 528
Pocahontas County 21.6 1,465 1,870
Polk County 25.0 119,828 520
Pottawattamie County 23.5 21,991 1,003
Poweshiek County 19.6 3,596 2,522
Ringgold County 24.1 1,198 754
Sac County 22.3 2,188 1,530
Scott County 23.9 41,147 851
Shelby County 22.3 2,587 1,545
Sioux County 27.1 9,432 211
Story County 16.6 16,104 2,990
Tama County 24.0 4,096 785
Taylor County 23.3 1,435 1,110
Union County 22.5 2,775 1,472
Van Buren County 23.3 1,669 1,071
Wapello County 22.7 7,987 1,350
Warren County 24.8 12,423 564
Washington County 24.7 5,466 587
Wayne County 25.2 1,618 479
Webster County 21.3 7,768 1,999
Winnebago County 21.7 2,286 1,796
Winneshiek County 18.5 3,750 2,763
Woodbury County 26.2 26,845 320
Worth County 21.0 1,561 2,097
Wright County 24.0 3,057 797
Notes:
Created by statecancerprofiles.cancer.gov on 05/17/2022 9:50 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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