Demographics Table
Demographic Data Report for Iowa by County
Population: Age 18-39
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 18-39)
|
Rank within US (of 3143 counties)
|
|---|---|---|---|---|
| United States | N/A | 29.5 | 98,945,767 | N/A |
| Iowa | N/A | 28.8 | 925,984 | 28 of 52 |
| Story County | Urban | 48.8 | 49,072 | 13 |
| Johnson County | Urban | 42.0 | 65,829 | 40 |
| Black Hawk County | Urban | 33.2 | 43,546 | 232 |
| Polk County | Urban | 31.4 | 157,937 | 337 |
| Decatur County | Rural | 30.9 | 2,399 | 385 |
| Dallas County | Urban | 30.0 | 32,373 | 482 |
| Poweshiek County | Rural | 29.7 | 5,501 | 525 |
| Buena Vista County | Rural | 29.3 | 6,088 | 594 |
| Bremer County | Urban | 29.0 | 7,316 | 656 |
| Webster County | Rural | 29.0 | 10,698 | 656 |
| Dubuque County | Urban | 28.9 | 28,641 | 676 |
| Sioux County | Rural | 28.9 | 10,462 | 676 |
| Linn County | Urban | 28.8 | 66,141 | 703 |
| Jefferson County | Rural | 28.4 | 4,458 | 782 |
| Woodbury County | Urban | 28.4 | 30,217 | 782 |
| Winneshiek County | Rural | 27.8 | 5,531 | 911 |
| Henry County | Rural | 27.7 | 5,533 | 935 |
| Scott County | Urban | 27.7 | 48,309 | 935 |
| Mahaska County | Rural | 27.5 | 6,047 | 993 |
| Warren County | Urban | 27.2 | 14,809 | 1,081 |
| Marion County | Rural | 27.0 | 9,075 | 1,142 |
| Pottawattamie County | Urban | 27.0 | 25,180 | 1,142 |
| Union County | Rural | 26.8 | 3,209 | 1,196 |
| Wapello County | Rural | 26.8 | 9,487 | 1,196 |
| Clarke County | Rural | 26.7 | 2,584 | 1,232 |
| Emmet County | Rural | 26.6 | 2,463 | 1,264 |
| Muscatine County | Rural | 26.6 | 11,317 | 1,264 |
| Marshall County | Rural | 26.5 | 10,624 | 1,298 |
| Winnebago County | Rural | 26.4 | 2,791 | 1,335 |
| O'Brien County | Rural | 26.3 | 3,709 | 1,375 |
| Jasper County | Urban | 26.2 | 9,937 | 1,415 |
| Boone County | Urban | 26.0 | 6,928 | 1,485 |
| Monroe County | Rural | 25.9 | 1,947 | 1,522 |
| Crawford County | Rural | 25.8 | 4,200 | 1,555 |
| Jones County | Urban | 25.6 | 5,347 | 1,623 |
| Appanoose County | Rural | 25.2 | 3,072 | 1,789 |
| Des Moines County | Rural | 25.2 | 9,684 | 1,789 |
| Howard County | Rural | 25.2 | 2,384 | 1,789 |
| Page County | Rural | 25.2 | 3,806 | 1,789 |
| Calhoun County | Rural | 25.0 | 2,455 | 1,871 |
| Tama County | Rural | 25.0 | 4,215 | 1,871 |
| Adair County | Rural | 24.9 | 1,861 | 1,908 |
| Lyon County | Rural | 24.9 | 3,025 | 1,908 |
| Cedar County | Rural | 24.8 | 4,549 | 1,934 |
| Louisa County | Rural | 24.7 | 2,640 | 1,977 |
| Washington County | Urban | 24.7 | 5,562 | 1,977 |
| Clinton County | Rural | 24.6 | 11,402 | 2,016 |
| Hardin County | Rural | 24.6 | 4,096 | 2,016 |
| Harrison County | Urban | 24.6 | 3,604 | 2,016 |
| Mills County | Urban | 24.6 | 3,577 | 2,016 |
| Fayette County | Rural | 24.5 | 4,721 | 2,046 |
| Grundy County | Urban | 24.5 | 3,029 | 2,046 |
| Wright County | Rural | 24.5 | 3,138 | 2,046 |
| Cerro Gordo County | Rural | 24.3 | 10,355 | 2,109 |
| Clay County | Rural | 24.2 | 3,987 | 2,138 |
| Lee County | Rural | 24.2 | 7,944 | 2,138 |
| Buchanan County | Rural | 24.1 | 4,982 | 2,168 |
| Keokuk County | Rural | 24.1 | 2,389 | 2,168 |
| Madison County | Urban | 24.1 | 4,072 | 2,168 |
| Ida County | Rural | 23.9 | 1,654 | 2,221 |
| Carroll County | Rural | 23.8 | 4,905 | 2,253 |
| Kossuth County | Rural | 23.8 | 3,459 | 2,253 |
| Palo Alto County | Rural | 23.8 | 2,106 | 2,253 |
| Plymouth County | Rural | 23.8 | 6,121 | 2,253 |
| Greene County | Rural | 23.7 | 2,058 | 2,289 |
| Humboldt County | Rural | 23.7 | 2,274 | 2,289 |
| Hamilton County | Rural | 23.6 | 3,513 | 2,311 |
| Osceola County | Rural | 23.6 | 1,437 | 2,311 |
| Benton County | Urban | 23.5 | 6,045 | 2,338 |
| Montgomery County | Rural | 23.4 | 2,392 | 2,371 |
| Iowa County | Rural | 23.3 | 3,843 | 2,400 |
| Lucas County | Rural | 23.3 | 2,028 | 2,400 |
| Mitchell County | Rural | 23.3 | 2,461 | 2,400 |
| Ringgold County | Rural | 23.2 | 1,076 | 2,438 |
| Davis County | Rural | 23.1 | 2,118 | 2,459 |
| Butler County | Rural | 23.0 | 3,280 | 2,479 |
| Floyd County | Rural | 23.0 | 3,533 | 2,479 |
| Pocahontas County | Rural | 23.0 | 1,623 | 2,479 |
| Delaware County | Rural | 22.9 | 4,018 | 2,508 |
| Worth County | Rural | 22.9 | 1,683 | 2,508 |
| Chickasaw County | Rural | 22.8 | 2,694 | 2,538 |
| Hancock County | Rural | 22.8 | 2,436 | 2,538 |
| Jackson County | Rural | 22.8 | 4,413 | 2,538 |
| Taylor County | Rural | 22.8 | 1,337 | 2,538 |
| Monona County | Rural | 22.5 | 1,922 | 2,613 |
| Allamakee County | Rural | 22.4 | 3,159 | 2,634 |
| Franklin County | Rural | 22.4 | 2,231 | 2,634 |
| Shelby County | Rural | 22.3 | 2,632 | 2,652 |
| Cass County | Rural | 22.2 | 2,906 | 2,667 |
| Wayne County | Rural | 22.2 | 1,449 | 2,667 |
| Sac County | Rural | 22.1 | 2,142 | 2,690 |
| Cherokee County | Rural | 21.8 | 2,531 | 2,742 |
| Guthrie County | Urban | 21.8 | 2,329 | 2,742 |
| Adams County | Rural | 21.5 | 777 | 2,787 |
| Clayton County | Rural | 21.1 | 3,583 | 2,837 |
| Fremont County | Rural | 20.6 | 1,341 | 2,901 |
| Dickinson County | Rural | 20.5 | 3,692 | 2,913 |
| Van Buren County | Rural | 20.5 | 1,481 | 2,913 |
| Audubon County | Rural | 18.7 | 1,048 | 3,034 |
Notes:
Created by statecancerprofiles.cancer.gov on 03/30/2026 5:08 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 18-39, see the dictionary.
Data for United States does not include Puerto Rico.