Demographics Table
Demographic Data Report for Iowa by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2020-2024 American Community Survey 5-Year Data
Sorted by Percent
County
|
2023 Rural-Urban Continuum Codes Φ
|
Value (Percent)
|
People (Age Under 18)
|
Rank within US (of 3143 counties)
|
|---|---|---|---|---|
| United States | N/A | 22.0 | 73,517,834 | N/A |
| Iowa | N/A | 22.9 | 735,015 | 15 of 52 |
| Polk County | Urban | 24.4 | 122,594 | 573 |
| Linn County | Urban | 22.5 | 51,857 | 1,260 |
| Scott County | Urban | 23.1 | 40,411 | 1,006 |
| Johnson County | Urban | 19.3 | 30,276 | 2,459 |
| Black Hawk County | Urban | 21.9 | 28,744 | 1,525 |
| Dallas County | Urban | 26.6 | 28,676 | 203 |
| Woodbury County | Urban | 25.8 | 27,391 | 280 |
| Dubuque County | Urban | 22.5 | 22,317 | 1,260 |
| Pottawattamie County | Urban | 22.9 | 21,407 | 1,096 |
| Story County | Urban | 16.2 | 16,276 | 2,956 |
| Warren County | Urban | 24.4 | 13,292 | 573 |
| Clinton County | Rural | 22.9 | 10,582 | 1,096 |
| Marshall County | Rural | 25.4 | 10,175 | 340 |
| Muscatine County | Rural | 23.9 | 10,171 | 717 |
| Sioux County | Rural | 27.2 | 9,837 | 165 |
| Cerro Gordo County | Rural | 20.8 | 8,861 | 1,978 |
| Des Moines County | Rural | 22.2 | 8,560 | 1,395 |
| Wapello County | Rural | 23.8 | 8,432 | 748 |
| Jasper County | Urban | 22.0 | 8,357 | 1,478 |
| Webster County | Rural | 21.4 | 7,885 | 1,735 |
| Marion County | Rural | 23.1 | 7,769 | 1,006 |
| Lee County | Rural | 21.2 | 6,989 | 1,816 |
| Plymouth County | Rural | 25.0 | 6,443 | 435 |
| Benton County | Urban | 22.9 | 5,881 | 1,096 |
| Bremer County | Urban | 22.4 | 5,654 | 1,311 |
| Boone County | Urban | 21.0 | 5,612 | 1,910 |
| Washington County | Urban | 24.5 | 5,533 | 542 |
| Buena Vista County | Rural | 26.6 | 5,519 | 203 |
| Buchanan County | Rural | 25.4 | 5,251 | 340 |
| Mahaska County | Rural | 23.7 | 5,213 | 778 |
| Carroll County | Rural | 24.4 | 5,020 | 573 |
| Jackson County | Rural | 22.2 | 4,303 | 1,395 |
| Madison County | Urban | 25.2 | 4,258 | 385 |
| Jones County | Urban | 20.2 | 4,212 | 2,193 |
| Henry County | Rural | 20.9 | 4,178 | 1,936 |
| Crawford County | Rural | 25.5 | 4,143 | 321 |
| Fayette County | Rural | 21.4 | 4,123 | 1,735 |
| Delaware County | Rural | 23.3 | 4,084 | 926 |
| Tama County | Rural | 23.7 | 4,003 | 778 |
| Cedar County | Rural | 21.1 | 3,875 | 1,869 |
| Iowa County | Rural | 23.3 | 3,851 | 926 |
| Clay County | Rural | 23.3 | 3,841 | 926 |
| Winneshiek County | Rural | 18.7 | 3,714 | 2,601 |
| Clayton County | Rural | 21.6 | 3,680 | 1,650 |
| Poweshiek County | Rural | 19.4 | 3,593 | 2,426 |
| Hamilton County | Rural | 23.8 | 3,547 | 748 |
| Floyd County | Rural | 22.7 | 3,478 | 1,174 |
| Allamakee County | Rural | 24.5 | 3,448 | 542 |
| O'Brien County | Rural | 24.4 | 3,446 | 573 |
| Dickinson County | Rural | 19.1 | 3,429 | 2,518 |
| Lyon County | Rural | 28.2 | 3,425 | 126 |
| Harrison County | Urban | 23.1 | 3,378 | 1,006 |
| Wright County | Rural | 26.0 | 3,329 | 255 |
| Mills County | Urban | 22.8 | 3,326 | 1,133 |
| Kossuth County | Rural | 22.0 | 3,198 | 1,478 |
| Butler County | Rural | 22.4 | 3,193 | 1,311 |
| Hardin County | Rural | 19.0 | 3,157 | 2,544 |
| Cass County | Rural | 23.2 | 3,035 | 962 |
| Page County | Rural | 19.2 | 2,906 | 2,493 |
| Grundy County | Urban | 23.5 | 2,905 | 847 |
| Chickasaw County | Rural | 23.2 | 2,743 | 962 |
| Davis County | Rural | 29.9 | 2,737 | 72 |
| Shelby County | Rural | 22.9 | 2,699 | 1,096 |
| Union County | Rural | 22.5 | 2,697 | 1,260 |
| Jefferson County | Rural | 17.1 | 2,692 | 2,875 |
| Appanoose County | Rural | 21.6 | 2,626 | 1,650 |
| Cherokee County | Rural | 22.2 | 2,575 | 1,395 |
| Mitchell County | Rural | 23.8 | 2,522 | 748 |
| Clarke County | Rural | 25.6 | 2,470 | 306 |
| Howard County | Rural | 25.8 | 2,441 | 280 |
| Franklin County | Rural | 24.1 | 2,396 | 657 |
| Louisa County | Rural | 22.0 | 2,347 | 1,478 |
| Montgomery County | Rural | 22.6 | 2,307 | 1,220 |
| Humboldt County | Rural | 23.7 | 2,274 | 778 |
| Guthrie County | Urban | 21.2 | 2,269 | 1,816 |
| Hancock County | Rural | 21.0 | 2,243 | 1,910 |
| Winnebago County | Rural | 21.1 | 2,229 | 1,869 |
| Keokuk County | Rural | 22.4 | 2,219 | 1,311 |
| Calhoun County | Rural | 21.7 | 2,130 | 1,613 |
| Sac County | Rural | 21.7 | 2,105 | 1,613 |
| Lucas County | Rural | 23.5 | 2,049 | 847 |
| Palo Alto County | Rural | 23.1 | 2,044 | 1,006 |
| Monona County | Rural | 22.6 | 1,935 | 1,220 |
| Greene County | Rural | 21.7 | 1,889 | 1,613 |
| Emmet County | Rural | 19.1 | 1,766 | 2,518 |
| Monroe County | Rural | 23.0 | 1,731 | 1,057 |
| Decatur County | Rural | 22.2 | 1,721 | 1,395 |
| Van Buren County | Rural | 23.6 | 1,709 | 809 |
| Adair County | Rural | 22.9 | 1,706 | 1,096 |
| Wayne County | Rural | 25.9 | 1,695 | 269 |
| Ida County | Rural | 24.3 | 1,680 | 602 |
| Pocahontas County | Rural | 23.3 | 1,644 | 926 |
| Worth County | Rural | 20.7 | 1,520 | 2,021 |
| Fremont County | Rural | 21.4 | 1,391 | 1,735 |
| Osceola County | Rural | 22.7 | 1,383 | 1,174 |
| Taylor County | Rural | 22.7 | 1,330 | 1,174 |
| Audubon County | Rural | 21.6 | 1,210 | 1,650 |
| Ringgold County | Rural | 22.4 | 1,042 | 1,311 |
| Adams County | Rural | 22.3 | 806 | 1,356 |
Notes:
Created by statecancerprofiles.cancer.gov on 03/30/2026 9:33 am.
Φ Rural–urban county classifications are based on the 2023 USDA Rural–Urban Continuum Codes (except for Connecticut Counties which use 2013 codes). State-level cancer rates for rural areas are calculated using cancer cases registered exclusively in rural counties, while state-level cancer rates for urban areas are calculated using cases registered exclusively in urban counties.
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.