Demographics Table
Demographic Data Report for Iowa by County
Population: Age 40 and over
All Races (includes Hispanic), Both Sexes
2019-2023 American Community Survey 5-Year Data
Sorted by Value
County
|
2023 Rural-Urban Continuum Codes Φ
|
Value (Percent)
|
People (Age 40 And Over)
|
Rank within US (of 3143 counties)
|
|---|---|---|---|---|
| Iowa | N/A | 48.2 | 1,539,086 | 33 of 52 |
| United States | N/A | 48.3 | 160,683,909 | N/A |
| Story County | Urban | 34.9 | 34,448 | 3,116 |
| Johnson County | Urban | 38.4 | 59,413 | 3,067 |
| Dallas County | Urban | 42.8 | 44,564 | 2,903 |
| Sioux County | Rural | 43.5 | 15,659 | 2,858 |
| Buena Vista County | Rural | 44.0 | 9,098 | 2,823 |
| Polk County | Urban | 44.2 | 219,996 | 2,811 |
| Black Hawk County | Urban | 44.6 | 58,330 | 2,788 |
| Woodbury County | Urban | 45.6 | 48,204 | 2,697 |
| Davis County | Rural | 46.6 | 4,249 | 2,582 |
| Decatur County | Rural | 46.6 | 3,571 | 2,582 |
| Lyon County | Rural | 47.1 | 5,696 | 2,522 |
| Bremer County | Urban | 48.1 | 12,087 | 2,398 |
| Warren County | Urban | 48.1 | 25,744 | 2,398 |
| Clarke County | Rural | 48.2 | 4,670 | 2,375 |
| Dubuque County | Urban | 48.2 | 47,679 | 2,375 |
| Linn County | Urban | 48.2 | 110,685 | 2,375 |
| Marshall County | Rural | 48.4 | 19,360 | 2,334 |
| Crawford County | Rural | 48.7 | 7,937 | 2,283 |
| Muscatine County | Rural | 48.7 | 20,833 | 2,283 |
| Scott County | Urban | 48.7 | 84,841 | 2,283 |
| Howard County | Rural | 48.9 | 4,627 | 2,240 |
| Mahaska County | Rural | 49.0 | 10,810 | 2,224 |
| O'Brien County | Rural | 49.6 | 7,000 | 2,089 |
| Marion County | Rural | 49.7 | 16,683 | 2,071 |
| Webster County | Rural | 49.7 | 18,328 | 2,071 |
| Wright County | Rural | 49.7 | 6,370 | 2,071 |
| Buchanan County | Rural | 49.8 | 10,285 | 2,045 |
| Wapello County | Rural | 49.9 | 17,592 | 2,023 |
| Pottawattamie County | Urban | 50.2 | 46,895 | 1,964 |
| Washington County | Urban | 50.4 | 11,356 | 1,909 |
| Henry County | Rural | 50.6 | 10,232 | 1,867 |
| Union County | Rural | 50.8 | 6,120 | 1,823 |
| Plymouth County | Rural | 50.9 | 13,083 | 1,802 |
| Poweshiek County | Rural | 51.1 | 9,495 | 1,751 |
| Madison County | Urban | 51.4 | 8,612 | 1,669 |
| Tama County | Rural | 51.6 | 8,755 | 1,629 |
| Jasper County | Urban | 51.7 | 19,565 | 1,591 |
| Monroe County | Rural | 51.7 | 3,900 | 1,591 |
| Winnebago County | Rural | 51.7 | 5,500 | 1,591 |
| Grundy County | Urban | 51.9 | 6,407 | 1,542 |
| Harrison County | Urban | 52.1 | 7,633 | 1,497 |
| Clay County | Rural | 52.2 | 8,583 | 1,468 |
| Wayne County | Rural | 52.2 | 3,405 | 1,468 |
| Humboldt County | Rural | 52.3 | 5,004 | 1,441 |
| Ida County | Rural | 52.3 | 3,630 | 1,441 |
| Mitchell County | Rural | 52.5 | 5,533 | 1,392 |
| Boone County | Urban | 52.6 | 14,021 | 1,368 |
| Palo Alto County | Rural | 52.6 | 4,686 | 1,368 |
| Carroll County | Rural | 52.7 | 10,898 | 1,343 |
| Franklin County | Rural | 52.7 | 5,259 | 1,343 |
| Adair County | Rural | 52.8 | 3,946 | 1,309 |
| Calhoun County | Rural | 52.8 | 5,207 | 1,309 |
| Des Moines County | Rural | 52.8 | 20,385 | 1,309 |
| Clinton County | Rural | 53.0 | 24,564 | 1,255 |
| Hamilton County | Rural | 53.0 | 7,891 | 1,255 |
| Iowa County | Rural | 53.0 | 8,762 | 1,255 |
| Louisa County | Rural | 53.0 | 5,678 | 1,255 |
| Winneshiek County | Rural | 53.0 | 10,577 | 1,255 |
| Benton County | Urban | 53.3 | 13,701 | 1,189 |
| Keokuk County | Rural | 53.3 | 5,312 | 1,189 |
| Mills County | Urban | 53.4 | 7,781 | 1,162 |
| Fayette County | Rural | 53.5 | 10,367 | 1,137 |
| Allamakee County | Rural | 53.6 | 7,524 | 1,120 |
| Emmet County | Rural | 53.8 | 5,010 | 1,078 |
| Cedar County | Rural | 53.9 | 9,935 | 1,056 |
| Osceola County | Rural | 54.1 | 3,306 | 1,011 |
| Taylor County | Rural | 54.1 | 3,194 | 1,011 |
| Pocahontas County | Rural | 54.2 | 3,818 | 977 |
| Ringgold County | Rural | 54.2 | 2,530 | 977 |
| Delaware County | Rural | 54.3 | 9,524 | 959 |
| Chickasaw County | Rural | 54.4 | 6,451 | 936 |
| Jefferson County | Rural | 54.4 | 8,528 | 936 |
| Lucas County | Rural | 54.4 | 4,721 | 936 |
| Appanoose County | Rural | 54.5 | 6,677 | 912 |
| Floyd County | Rural | 54.5 | 8,450 | 912 |
| Kossuth County | Rural | 54.5 | 7,968 | 912 |
| Montgomery County | Rural | 54.6 | 5,594 | 889 |
| Butler County | Rural | 54.7 | 7,821 | 870 |
| Cerro Gordo County | Rural | 54.7 | 23,388 | 870 |
| Cass County | Rural | 54.8 | 7,192 | 848 |
| Jackson County | Rural | 54.8 | 10,644 | 848 |
| Lee County | Rural | 54.8 | 18,170 | 848 |
| Monona County | Rural | 54.8 | 4,723 | 848 |
| Shelby County | Rural | 54.8 | 6,443 | 848 |
| Jones County | Urban | 55.1 | 11,456 | 797 |
| Sac County | Rural | 55.3 | 5,397 | 770 |
| Greene County | Rural | 55.4 | 4,835 | 755 |
| Page County | Rural | 55.7 | 8,447 | 696 |
| Worth County | Rural | 55.8 | 4,117 | 685 |
| Hancock County | Rural | 55.9 | 5,991 | 666 |
| Hardin County | Rural | 56.2 | 9,406 | 630 |
| Van Buren County | Rural | 56.6 | 4,093 | 580 |
| Adams County | Rural | 56.9 | 2,072 | 561 |
| Clayton County | Rural | 57.0 | 9,723 | 548 |
| Audubon County | Rural | 57.1 | 3,210 | 535 |
| Cherokee County | Rural | 57.6 | 6,669 | 478 |
| Fremont County | Rural | 57.6 | 3,782 | 478 |
| Guthrie County | Urban | 57.7 | 6,138 | 465 |
| Dickinson County | Rural | 59.6 | 10,637 | 288 |
Notes:
Created by statecancerprofiles.cancer.gov on 02/07/2026 12:39 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 40 and over, see the dictionary.
Data for United States does not include Puerto Rico.
Created by statecancerprofiles.cancer.gov on 02/07/2026 12:39 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 40 and over, see the dictionary.
Data for United States does not include Puerto Rico.