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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 Count

County
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2023 Rural-Urban Continuum Codes Φ
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Value (Percent)
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People (Age 18-39)
 sort by sample size descending
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
Adams County Rural 21.2 773 2,825
Ringgold County Rural 22.6 1,053 2,567
Audubon County Rural 20.7 1,163 2,899
Taylor County Rural 22.4 1,321 2,619
Fremont County Rural 20.5 1,347 2,922
Osceola County Rural 22.4 1,372 2,619
Wayne County Rural 21.5 1,399 2,780
Van Buren County Rural 20.2 1,462 2,946
Pocahontas County Rural 22.7 1,600 2,546
Ida County Rural 23.3 1,616 2,387
Worth County Rural 23.6 1,743 2,294
Adair County Rural 24.2 1,810 2,118
Monroe County Rural 25.2 1,901 1,764
Monona County Rural 22.8 1,964 2,515
Lucas County Rural 22.6 1,966 2,567
Greene County Rural 23.4 2,043 2,359
Palo Alto County Rural 23.9 2,129 2,208
Davis County Rural 23.5 2,148 2,328
Sac County Rural 22.4 2,190 2,619
Guthrie County Urban 20.9 2,229 2,866
Franklin County Rural 22.8 2,279 2,515
Humboldt County Rural 24.1 2,303 2,153
Montgomery County Rural 22.8 2,340 2,515
Decatur County Rural 30.9 2,368 376
Keokuk County Rural 24.0 2,390 2,185
Cherokee County Rural 20.7 2,396 2,899
Howard County Rural 25.5 2,413 1,655
Hancock County Rural 22.8 2,446 2,515
Mitchell County Rural 23.5 2,481 2,328
Emmet County Rural 26.7 2,489 1,210
Calhoun County Rural 25.3 2,499 1,724
Clarke County Rural 26.3 2,546 1,356
Shelby County Rural 22.4 2,628 2,619
Louisa County Rural 24.6 2,630 1,991
Chickasaw County Rural 22.3 2,648 2,639
Cass County Rural 21.6 2,833 2,761
Winnebago County Rural 26.6 2,833 1,248
Lyon County Rural 24.3 2,940 2,094
Appanoose County Rural 24.0 2,944 2,185
Grundy County Urban 24.5 3,028 2,020
Union County Rural 25.4 3,060 1,691
Wright County Rural 24.2 3,104 2,118
Allamakee County Rural 22.3 3,128 2,639
Butler County Rural 22.8 3,265 2,515
Kossuth County Rural 23.2 3,391 2,414
Mills County Urban 23.5 3,420 2,328
Hamilton County Rural 23.6 3,516 2,294
Floyd County Rural 22.9 3,544 2,494
Harrison County Urban 24.8 3,635 1,916
Clayton County Rural 21.3 3,638 2,815
O'Brien County Rural 26.0 3,665 1,479
Dickinson County Rural 21.1 3,774 2,843
Page County Rural 25.1 3,813 1,791
Iowa County Rural 23.6 3,897 2,294
Delaware County Rural 22.3 3,910 2,639
Madison County Urban 23.7 3,973 2,266
Clay County Rural 24.7 4,060 1,961
Hardin County Rural 24.5 4,106 2,020
Tama County Rural 24.4 4,148 2,056
Crawford County Rural 26.0 4,231 1,479
Jefferson County Rural 28.5 4,464 755
Jackson County Rural 23.0 4,472 2,466
Cedar County Rural 24.6 4,539 1,991
Carroll County Rural 23.2 4,793 2,414
Fayette County Rural 25.2 4,881 1,764
Jones County Urban 24.0 4,999 2,185
Buchanan County Rural 24.5 5,052 2,020
Poweshiek County Rural 29.4 5,468 578
Winneshiek County Rural 28.1 5,605 835
Washington County Urban 25.0 5,630 1,828
Henry County Rural 28.4 5,742 775
Mahaska County Rural 27.1 5,973 1,092
Benton County Urban 23.6 6,056 2,294
Buena Vista County Rural 29.3 6,065 602
Plymouth County Rural 24.1 6,205 2,153
Boone County Urban 26.5 7,067 1,285
Bremer County Urban 29.3 7,354 602
Lee County Rural 23.9 7,930 2,208
Marion County Rural 26.9 9,023 1,143
Wapello County Rural 26.4 9,324 1,323
Des Moines County Rural 25.3 9,768 1,724
Jasper County Urban 26.2 9,917 1,389
Cerro Gordo County Rural 24.4 10,433 2,056
Sioux County Rural 29.0 10,451 662
Marshall County Rural 26.2 10,484 1,389
Webster County Rural 28.9 10,648 682
Clinton County Rural 24.3 11,287 2,094
Muscatine County Rural 27.0 11,558 1,116
Warren County Urban 27.2 14,568 1,068
Pottawattamie County Urban 26.6 24,867 1,248
Dubuque County Urban 29.1 28,838 644
Woodbury County Urban 28.5 30,136 755
Dallas County Urban 30.4 31,633 432
Black Hawk County Urban 33.4 43,684 216
Story County Urban 48.6 47,944 13
Scott County Urban 27.9 48,675 880
Johnson County Urban 42.1 65,192 39
Linn County Urban 29.0 66,545 662
Polk County Urban 31.2 155,061 352
Notes:
Created by statecancerprofiles.cancer.gov on 07/12/2025 3:35 am.

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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