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Demographic Data Report for Iowa by County
Population: Age 18-39
All Races (includes Hispanic), Both Sexes
2019-2023 American Community Survey 5-Year Data
Sorted by Name

County
 sort alphabetically by name descending
2023 Rural-Urban Continuum Codes Φ
 sort by rural urban descending
Value (Percent)
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People (Age 18-39)
 sort by sample size ascending
Rank within US
(of 3143 counties)
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Iowa N/A 28.8 920,272 28 of 52
United States N/A 29.5 98,058,393 N/A
Adair County Rural 24.2 1,810 2,118
Adams County Rural 21.2 773 2,825
Allamakee County Rural 22.3 3,128 2,639
Appanoose County Rural 24.0 2,944 2,185
Audubon County Rural 20.7 1,163 2,899
Benton County Urban 23.6 6,056 2,294
Black Hawk County Urban 33.4 43,684 216
Boone County Urban 26.5 7,067 1,285
Bremer County Urban 29.3 7,354 602
Buchanan County Rural 24.5 5,052 2,020
Buena Vista County Rural 29.3 6,065 602
Butler County Rural 22.8 3,265 2,515
Calhoun County Rural 25.3 2,499 1,724
Carroll County Rural 23.2 4,793 2,414
Cass County Rural 21.6 2,833 2,761
Cedar County Rural 24.6 4,539 1,991
Cerro Gordo County Rural 24.4 10,433 2,056
Cherokee County Rural 20.7 2,396 2,899
Chickasaw County Rural 22.3 2,648 2,639
Clarke County Rural 26.3 2,546 1,356
Clay County Rural 24.7 4,060 1,961
Clayton County Rural 21.3 3,638 2,815
Clinton County Rural 24.3 11,287 2,094
Crawford County Rural 26.0 4,231 1,479
Dallas County Urban 30.4 31,633 432
Davis County Rural 23.5 2,148 2,328
Decatur County Rural 30.9 2,368 376
Delaware County Rural 22.3 3,910 2,639
Des Moines County Rural 25.3 9,768 1,724
Dickinson County Rural 21.1 3,774 2,843
Dubuque County Urban 29.1 28,838 644
Emmet County Rural 26.7 2,489 1,210
Fayette County Rural 25.2 4,881 1,764
Floyd County Rural 22.9 3,544 2,494
Franklin County Rural 22.8 2,279 2,515
Fremont County Rural 20.5 1,347 2,922
Greene County Rural 23.4 2,043 2,359
Grundy County Urban 24.5 3,028 2,020
Guthrie County Urban 20.9 2,229 2,866
Hamilton County Rural 23.6 3,516 2,294
Hancock County Rural 22.8 2,446 2,515
Hardin County Rural 24.5 4,106 2,020
Harrison County Urban 24.8 3,635 1,916
Henry County Rural 28.4 5,742 775
Howard County Rural 25.5 2,413 1,655
Humboldt County Rural 24.1 2,303 2,153
Ida County Rural 23.3 1,616 2,387
Iowa County Rural 23.6 3,897 2,294
Jackson County Rural 23.0 4,472 2,466
Jasper County Urban 26.2 9,917 1,389
Jefferson County Rural 28.5 4,464 755
Johnson County Urban 42.1 65,192 39
Jones County Urban 24.0 4,999 2,185
Keokuk County Rural 24.0 2,390 2,185
Kossuth County Rural 23.2 3,391 2,414
Lee County Rural 23.9 7,930 2,208
Linn County Urban 29.0 66,545 662
Louisa County Rural 24.6 2,630 1,991
Lucas County Rural 22.6 1,966 2,567
Lyon County Rural 24.3 2,940 2,094
Madison County Urban 23.7 3,973 2,266
Mahaska County Rural 27.1 5,973 1,092
Marion County Rural 26.9 9,023 1,143
Marshall County Rural 26.2 10,484 1,389
Mills County Urban 23.5 3,420 2,328
Mitchell County Rural 23.5 2,481 2,328
Monona County Rural 22.8 1,964 2,515
Monroe County Rural 25.2 1,901 1,764
Montgomery County Rural 22.8 2,340 2,515
Muscatine County Rural 27.0 11,558 1,116
O'Brien County Rural 26.0 3,665 1,479
Osceola County Rural 22.4 1,372 2,619
Page County Rural 25.1 3,813 1,791
Palo Alto County Rural 23.9 2,129 2,208
Plymouth County Rural 24.1 6,205 2,153
Pocahontas County Rural 22.7 1,600 2,546
Polk County Urban 31.2 155,061 352
Pottawattamie County Urban 26.6 24,867 1,248
Poweshiek County Rural 29.4 5,468 578
Ringgold County Rural 22.6 1,053 2,567
Sac County Rural 22.4 2,190 2,619
Scott County Urban 27.9 48,675 880
Shelby County Rural 22.4 2,628 2,619
Sioux County Rural 29.0 10,451 662
Story County Urban 48.6 47,944 13
Tama County Rural 24.4 4,148 2,056
Taylor County Rural 22.4 1,321 2,619
Union County Rural 25.4 3,060 1,691
Van Buren County Rural 20.2 1,462 2,946
Wapello County Rural 26.4 9,324 1,323
Warren County Urban 27.2 14,568 1,068
Washington County Urban 25.0 5,630 1,828
Wayne County Rural 21.5 1,399 2,780
Webster County Rural 28.9 10,648 682
Winnebago County Rural 26.6 2,833 1,248
Winneshiek County Rural 28.1 5,605 835
Woodbury County Urban 28.5 30,136 755
Worth County Rural 23.6 1,743 2,294
Wright County Rural 24.2 3,104 2,118
Notes:
Created by statecancerprofiles.cancer.gov on 07/11/2025 11:56 pm.

Φ Rural-Urban Continuum Codes provided by the USDA.

Source: Demographic data provided by the Census Bureau and the American Community Survey.
For more information about Population: Age 18-39, see the dictionary.

Data for United States does not include Puerto Rico.

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