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Demographics Table

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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 Count

County
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2023 Rural-Urban Continuum Codes Φ
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Value (Percent)
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People (Age 40 And Over)
 sort by sample size descending
Rank within US
(of 3143 counties)
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Iowa N/A 48.2 1,539,086 33 of 52
United States N/A 48.3 160,683,909 N/A
Adams County Rural 56.9 2,072 561
Ringgold County Rural 54.2 2,530 977
Taylor County Rural 54.1 3,194 1,011
Audubon County Rural 57.1 3,210 535
Osceola County Rural 54.1 3,306 1,011
Wayne County Rural 52.2 3,405 1,468
Decatur County Rural 46.6 3,571 2,582
Ida County Rural 52.3 3,630 1,441
Fremont County Rural 57.6 3,782 478
Pocahontas County Rural 54.2 3,818 977
Monroe County Rural 51.7 3,900 1,591
Adair County Rural 52.8 3,946 1,309
Van Buren County Rural 56.6 4,093 580
Worth County Rural 55.8 4,117 685
Davis County Rural 46.6 4,249 2,582
Howard County Rural 48.9 4,627 2,240
Clarke County Rural 48.2 4,670 2,375
Palo Alto County Rural 52.6 4,686 1,368
Lucas County Rural 54.4 4,721 936
Monona County Rural 54.8 4,723 848
Greene County Rural 55.4 4,835 755
Humboldt County Rural 52.3 5,004 1,441
Emmet County Rural 53.8 5,010 1,078
Calhoun County Rural 52.8 5,207 1,309
Franklin County Rural 52.7 5,259 1,343
Keokuk County Rural 53.3 5,312 1,189
Sac County Rural 55.3 5,397 770
Winnebago County Rural 51.7 5,500 1,591
Mitchell County Rural 52.5 5,533 1,392
Montgomery County Rural 54.6 5,594 889
Louisa County Rural 53.0 5,678 1,255
Lyon County Rural 47.1 5,696 2,522
Hancock County Rural 55.9 5,991 666
Union County Rural 50.8 6,120 1,823
Guthrie County Urban 57.7 6,138 465
Wright County Rural 49.7 6,370 2,071
Grundy County Urban 51.9 6,407 1,542
Shelby County Rural 54.8 6,443 848
Chickasaw County Rural 54.4 6,451 936
Cherokee County Rural 57.6 6,669 478
Appanoose County Rural 54.5 6,677 912
O'Brien County Rural 49.6 7,000 2,089
Cass County Rural 54.8 7,192 848
Allamakee County Rural 53.6 7,524 1,120
Harrison County Urban 52.1 7,633 1,497
Mills County Urban 53.4 7,781 1,162
Butler County Rural 54.7 7,821 870
Hamilton County Rural 53.0 7,891 1,255
Crawford County Rural 48.7 7,937 2,283
Kossuth County Rural 54.5 7,968 912
Page County Rural 55.7 8,447 696
Floyd County Rural 54.5 8,450 912
Jefferson County Rural 54.4 8,528 936
Clay County Rural 52.2 8,583 1,468
Madison County Urban 51.4 8,612 1,669
Tama County Rural 51.6 8,755 1,629
Iowa County Rural 53.0 8,762 1,255
Buena Vista County Rural 44.0 9,098 2,823
Hardin County Rural 56.2 9,406 630
Poweshiek County Rural 51.1 9,495 1,751
Delaware County Rural 54.3 9,524 959
Clayton County Rural 57.0 9,723 548
Cedar County Rural 53.9 9,935 1,056
Henry County Rural 50.6 10,232 1,867
Buchanan County Rural 49.8 10,285 2,045
Fayette County Rural 53.5 10,367 1,137
Winneshiek County Rural 53.0 10,577 1,255
Dickinson County Rural 59.6 10,637 288
Jackson County Rural 54.8 10,644 848
Mahaska County Rural 49.0 10,810 2,224
Carroll County Rural 52.7 10,898 1,343
Washington County Urban 50.4 11,356 1,909
Jones County Urban 55.1 11,456 797
Bremer County Urban 48.1 12,087 2,398
Plymouth County Rural 50.9 13,083 1,802
Benton County Urban 53.3 13,701 1,189
Boone County Urban 52.6 14,021 1,368
Sioux County Rural 43.5 15,659 2,858
Marion County Rural 49.7 16,683 2,071
Wapello County Rural 49.9 17,592 2,023
Lee County Rural 54.8 18,170 848
Webster County Rural 49.7 18,328 2,071
Marshall County Rural 48.4 19,360 2,334
Jasper County Urban 51.7 19,565 1,591
Des Moines County Rural 52.8 20,385 1,309
Muscatine County Rural 48.7 20,833 2,283
Cerro Gordo County Rural 54.7 23,388 870
Clinton County Rural 53.0 24,564 1,255
Warren County Urban 48.1 25,744 2,398
Story County Urban 34.9 34,448 3,116
Dallas County Urban 42.8 44,564 2,903
Pottawattamie County Urban 50.2 46,895 1,964
Dubuque County Urban 48.2 47,679 2,375
Woodbury County Urban 45.6 48,204 2,697
Black Hawk County Urban 44.6 58,330 2,788
Johnson County Urban 38.4 59,413 3,067
Scott County Urban 48.7 84,841 2,283
Linn County Urban 48.2 110,685 2,375
Polk County Urban 44.2 219,996 2,811
Notes:
Created by statecancerprofiles.cancer.gov on 07/11/2025 11:31 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.

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