Demographics Table
Demographic Data Report for Iowa by County
Population: Age 40-64
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 40-64)
|
Rank within US (of 3143 counties)
|
|---|---|---|---|---|
| Iowa | N/A | 30.1 | 967,352 | 41 of 52 |
| United States | N/A | 31.3 | 104,825,270 | N/A |
| Story County | Urban | 21.7 | 21,843 | 3,124 |
| Johnson County | Urban | 25.3 | 39,700 | 3,051 |
| Decatur County | Rural | 25.8 | 2,000 | 3,025 |
| Black Hawk County | Urban | 27.2 | 35,621 | 2,915 |
| Wright County | Rural | 27.3 | 3,497 | 2,907 |
| Sioux County | Rural | 27.7 | 10,047 | 2,862 |
| Buena Vista County | Rural | 27.8 | 5,773 | 2,852 |
| Clarke County | Rural | 27.8 | 2,684 | 2,852 |
| Jefferson County | Rural | 27.8 | 4,363 | 2,852 |
| Lyon County | Rural | 27.9 | 3,392 | 2,843 |
| O'Brien County | Rural | 28.2 | 3,982 | 2,805 |
| Howard County | Rural | 28.5 | 2,688 | 2,749 |
| Kossuth County | Rural | 28.7 | 4,173 | 2,704 |
| Bremer County | Urban | 28.8 | 7,254 | 2,679 |
| Davis County | Rural | 28.8 | 2,641 | 2,679 |
| Dubuque County | Urban | 29.2 | 28,920 | 2,605 |
| Wayne County | Rural | 29.3 | 1,913 | 2,580 |
| Adair County | Rural | 29.6 | 2,209 | 2,488 |
| Appanoose County | Rural | 29.6 | 3,604 | 2,488 |
| Calhoun County | Rural | 29.6 | 2,898 | 2,488 |
| Ida County | Rural | 29.6 | 2,044 | 2,488 |
| Poweshiek County | Rural | 29.6 | 5,484 | 2,488 |
| Mahaska County | Rural | 29.8 | 6,562 | 2,423 |
| Pocahontas County | Rural | 29.8 | 2,097 | 2,423 |
| Webster County | Rural | 29.8 | 10,980 | 2,423 |
| Marshall County | Rural | 29.9 | 12,014 | 2,397 |
| Woodbury County | Urban | 29.9 | 31,775 | 2,397 |
| Allamakee County | Rural | 30.0 | 4,227 | 2,361 |
| Union County | Rural | 30.0 | 3,597 | 2,361 |
| Clay County | Rural | 30.1 | 4,947 | 2,329 |
| Greene County | Rural | 30.2 | 2,622 | 2,301 |
| Winneshiek County | Rural | 30.2 | 5,996 | 2,301 |
| Emmet County | Rural | 30.3 | 2,803 | 2,260 |
| Polk County | Urban | 30.3 | 152,369 | 2,260 |
| Tama County | Rural | 30.3 | 5,113 | 2,260 |
| Monroe County | Rural | 30.4 | 2,287 | 2,235 |
| Winnebago County | Rural | 30.4 | 3,222 | 2,235 |
| Carroll County | Rural | 30.6 | 6,308 | 2,150 |
| Dallas County | Urban | 30.6 | 33,026 | 2,150 |
| Marion County | Rural | 30.6 | 10,283 | 2,150 |
| Monona County | Rural | 30.6 | 2,616 | 2,150 |
| Ringgold County | Rural | 30.7 | 1,428 | 2,103 |
| Washington County | Urban | 30.7 | 6,928 | 2,103 |
| Crawford County | Rural | 30.8 | 5,006 | 2,054 |
| Humboldt County | Rural | 30.9 | 2,968 | 1,998 |
| Montgomery County | Rural | 30.9 | 3,154 | 1,998 |
| Palo Alto County | Rural | 30.9 | 2,743 | 1,998 |
| Osceola County | Rural | 31.0 | 1,891 | 1,952 |
| Wapello County | Rural | 31.0 | 10,947 | 1,952 |
| Cherokee County | Rural | 31.1 | 3,609 | 1,896 |
| Grundy County | Urban | 31.1 | 3,850 | 1,896 |
| Keokuk County | Rural | 31.1 | 3,083 | 1,896 |
| Fayette County | Rural | 31.2 | 6,020 | 1,847 |
| Lucas County | Rural | 31.2 | 2,722 | 1,847 |
| Mitchell County | Rural | 31.2 | 3,302 | 1,847 |
| Cass County | Rural | 31.3 | 4,094 | 1,808 |
| Chickasaw County | Rural | 31.3 | 3,699 | 1,808 |
| Des Moines County | Rural | 31.3 | 12,063 | 1,808 |
| Floyd County | Rural | 31.3 | 4,791 | 1,808 |
| Henry County | Rural | 31.3 | 6,262 | 1,808 |
| Cerro Gordo County | Rural | 31.4 | 13,380 | 1,748 |
| Hamilton County | Rural | 31.4 | 4,669 | 1,748 |
| Linn County | Urban | 31.4 | 72,204 | 1,748 |
| Muscatine County | Rural | 31.4 | 13,380 | 1,748 |
| Page County | Rural | 31.4 | 4,755 | 1,748 |
| Plymouth County | Rural | 31.4 | 8,087 | 1,748 |
| Pottawattamie County | Urban | 31.4 | 29,329 | 1,748 |
| Butler County | Rural | 31.5 | 4,489 | 1,688 |
| Shelby County | Rural | 31.6 | 3,723 | 1,627 |
| Warren County | Urban | 31.6 | 17,196 | 1,627 |
| Scott County | Urban | 31.7 | 55,271 | 1,578 |
| Taylor County | Rural | 31.7 | 1,859 | 1,578 |
| Buchanan County | Rural | 31.9 | 6,606 | 1,466 |
| Sac County | Rural | 31.9 | 3,091 | 1,466 |
| Franklin County | Rural | 32.0 | 3,182 | 1,406 |
| Jasper County | Urban | 32.0 | 12,160 | 1,406 |
| Adams County | Rural | 32.1 | 1,163 | 1,357 |
| Harrison County | Urban | 32.1 | 4,704 | 1,357 |
| Clinton County | Rural | 32.2 | 14,906 | 1,301 |
| Dickinson County | Rural | 32.2 | 5,790 | 1,301 |
| Hancock County | Rural | 32.2 | 3,438 | 1,301 |
| Clayton County | Rural | 32.3 | 5,490 | 1,236 |
| Delaware County | Rural | 32.3 | 5,672 | 1,236 |
| Lee County | Rural | 32.4 | 10,651 | 1,175 |
| Van Buren County | Rural | 32.4 | 2,344 | 1,175 |
| Hardin County | Rural | 32.6 | 5,418 | 1,055 |
| Mills County | Urban | 32.6 | 4,744 | 1,055 |
| Guthrie County | Urban | 32.7 | 3,499 | 1,006 |
| Jackson County | Rural | 32.9 | 6,370 | 909 |
| Jones County | Urban | 32.9 | 6,878 | 909 |
| Boone County | Urban | 33.0 | 8,804 | 851 |
| Cedar County | Rural | 33.1 | 6,066 | 790 |
| Iowa County | Rural | 33.1 | 5,463 | 790 |
| Madison County | Urban | 33.1 | 5,601 | 790 |
| Louisa County | Rural | 33.2 | 3,545 | 745 |
| Worth County | Rural | 33.5 | 2,463 | 603 |
| Benton County | Urban | 33.8 | 8,705 | 485 |
| Fremont County | Rural | 33.9 | 2,207 | 452 |
| Audubon County | Rural | 34.2 | 1,916 | 362 |
Notes:
Created by statecancerprofiles.cancer.gov on 03/21/2026 2:38 pm.
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 40-64, see the dictionary.
Data for United States does not include Puerto Rico.