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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 Ruralurban

County
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2023 Rural-Urban Continuum Codes Φ
 sort by rural urban ascending
Value (Percent)
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People (Age 40 And Over)
 sort by sample size ascending
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
Benton County Urban 53.3 13,701 1,189
Black Hawk County Urban 44.6 58,330 2,788
Boone County Urban 52.6 14,021 1,368
Bremer County Urban 48.1 12,087 2,398
Dallas County Urban 42.8 44,564 2,903
Dubuque County Urban 48.2 47,679 2,375
Grundy County Urban 51.9 6,407 1,542
Guthrie County Urban 57.7 6,138 465
Harrison County Urban 52.1 7,633 1,497
Jasper County Urban 51.7 19,565 1,591
Johnson County Urban 38.4 59,413 3,067
Jones County Urban 55.1 11,456 797
Linn County Urban 48.2 110,685 2,375
Madison County Urban 51.4 8,612 1,669
Mills County Urban 53.4 7,781 1,162
Polk County Urban 44.2 219,996 2,811
Pottawattamie County Urban 50.2 46,895 1,964
Scott County Urban 48.7 84,841 2,283
Story County Urban 34.9 34,448 3,116
Warren County Urban 48.1 25,744 2,398
Washington County Urban 50.4 11,356 1,909
Woodbury County Urban 45.6 48,204 2,697
Adair County Rural 52.8 3,946 1,309
Adams County Rural 56.9 2,072 561
Allamakee County Rural 53.6 7,524 1,120
Appanoose County Rural 54.5 6,677 912
Audubon County Rural 57.1 3,210 535
Buchanan County Rural 49.8 10,285 2,045
Buena Vista County Rural 44.0 9,098 2,823
Butler County Rural 54.7 7,821 870
Calhoun County Rural 52.8 5,207 1,309
Carroll County Rural 52.7 10,898 1,343
Cass County Rural 54.8 7,192 848
Cedar County Rural 53.9 9,935 1,056
Cerro Gordo County Rural 54.7 23,388 870
Cherokee County Rural 57.6 6,669 478
Chickasaw County Rural 54.4 6,451 936
Clarke County Rural 48.2 4,670 2,375
Clay County Rural 52.2 8,583 1,468
Clayton County Rural 57.0 9,723 548
Clinton County Rural 53.0 24,564 1,255
Crawford County Rural 48.7 7,937 2,283
Davis County Rural 46.6 4,249 2,582
Decatur County Rural 46.6 3,571 2,582
Delaware County Rural 54.3 9,524 959
Des Moines County Rural 52.8 20,385 1,309
Dickinson County Rural 59.6 10,637 288
Emmet County Rural 53.8 5,010 1,078
Fayette County Rural 53.5 10,367 1,137
Floyd County Rural 54.5 8,450 912
Franklin County Rural 52.7 5,259 1,343
Fremont County Rural 57.6 3,782 478
Greene County Rural 55.4 4,835 755
Hamilton County Rural 53.0 7,891 1,255
Hancock County Rural 55.9 5,991 666
Hardin County Rural 56.2 9,406 630
Henry County Rural 50.6 10,232 1,867
Howard County Rural 48.9 4,627 2,240
Humboldt County Rural 52.3 5,004 1,441
Ida County Rural 52.3 3,630 1,441
Iowa County Rural 53.0 8,762 1,255
Jackson County Rural 54.8 10,644 848
Jefferson County Rural 54.4 8,528 936
Keokuk County Rural 53.3 5,312 1,189
Kossuth County Rural 54.5 7,968 912
Lee County Rural 54.8 18,170 848
Louisa County Rural 53.0 5,678 1,255
Lucas County Rural 54.4 4,721 936
Lyon County Rural 47.1 5,696 2,522
Mahaska County Rural 49.0 10,810 2,224
Marion County Rural 49.7 16,683 2,071
Marshall County Rural 48.4 19,360 2,334
Mitchell County Rural 52.5 5,533 1,392
Monona County Rural 54.8 4,723 848
Monroe County Rural 51.7 3,900 1,591
Montgomery County Rural 54.6 5,594 889
Muscatine County Rural 48.7 20,833 2,283
O'Brien County Rural 49.6 7,000 2,089
Osceola County Rural 54.1 3,306 1,011
Page County Rural 55.7 8,447 696
Palo Alto County Rural 52.6 4,686 1,368
Plymouth County Rural 50.9 13,083 1,802
Pocahontas County Rural 54.2 3,818 977
Poweshiek County Rural 51.1 9,495 1,751
Ringgold County Rural 54.2 2,530 977
Sac County Rural 55.3 5,397 770
Shelby County Rural 54.8 6,443 848
Sioux County Rural 43.5 15,659 2,858
Tama County Rural 51.6 8,755 1,629
Taylor County Rural 54.1 3,194 1,011
Union County Rural 50.8 6,120 1,823
Van Buren County Rural 56.6 4,093 580
Wapello County Rural 49.9 17,592 2,023
Wayne County Rural 52.2 3,405 1,468
Webster County Rural 49.7 18,328 2,071
Winnebago County Rural 51.7 5,500 1,591
Winneshiek County Rural 53.0 10,577 1,255
Worth County Rural 55.8 4,117 685
Wright County Rural 49.7 6,370 2,071
Notes:
Created by statecancerprofiles.cancer.gov on 06/24/2025 4:25 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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