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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
2017-2021 American Community Survey 5-Year Data
Sorted by Count
County
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Value (Percent)
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People (Age 40 And Over)
 sort by sample size ascending
Rank within US
(of 3143 counties)
 sort by rank ascending
United States 47.9 157,871,085 N/A
Iowa 47.8 1,518,059 31 of 52
Polk County 43.9 214,394 2,805
Linn County 47.4 108,242 2,435
Scott County 48.2 83,889 2,311
Black Hawk County 44.3 58,183 2,779
Johnson County 37.6 57,140 3,075
Dubuque County 48.2 47,568 2,303
Woodbury County 44.9 47,217 2,716
Pottawattamie County 49.3 46,166 2,095
Dallas County 42.1 40,633 2,920
Story County 34.3 33,643 3,119
Warren County 48.0 24,884 2,336
Clinton County 52.8 24,580 1,267
Cerro Gordo County 54.3 23,466 900
Des Moines County 52.9 20,663 1,239
Muscatine County 47.5 20,496 2,414
Marshall County 48.2 19,350 2,302
Jasper County 51.1 19,274 1,666
Lee County 53.8 18,156 1,016
Webster County 48.8 18,120 2,185
Wapello County 49.4 17,442 2,092
Marion County 49.5 16,516 2,067
Sioux County 42.9 15,294 2,872
Boone County 52.6 14,065 1,288
Benton County 53.4 13,688 1,117
Plymouth County 50.5 12,889 1,856
Bremer County 48.6 12,082 2,237
Washington County 50.3 11,320 1,904
Jones County 54.1 11,198 941
Carroll County 52.3 10,854 1,376
Mahaska County 48.5 10,738 2,247
Jackson County 54.0 10,533 968
Henry County 50.8 10,400 1,777
Winneshiek County 51.6 10,365 1,569
Fayette County 52.9 10,358 1,232
Dickinson County 58.8 10,316 327
Buchanan County 49.0 10,084 2,161
Cedar County 52.9 9,781 1,240
Clayton County 56.5 9,698 560
Delaware County 54.5 9,534 871
Poweshiek County 50.9 9,481 1,736
Hardin County 55.4 9,410 701
Buena Vista County 44.4 9,194 2,771
Iowa County 53.7 8,918 1,036
Tama County 51.6 8,811 1,561
Clay County 51.4 8,434 1,614
Page County 55.1 8,405 751
Floyd County 53.6 8,401 1,058
Jefferson County 52.9 8,378 1,244
Madison County 50.8 8,334 1,773
Kossuth County 54.4 8,062 887
Hamilton County 53.2 8,021 1,156
Butler County 54.4 7,841 892
Mills County 52.6 7,713 1,296
Harrison County 52.4 7,644 1,356
Crawford County 46.0 7,616 2,588
Allamakee County 54.0 7,596 974
Cass County 56.0 7,372 621
O'Brien County 50.9 7,201 1,729
Wright County 52.7 6,841 1,279
Appanoose County 53.7 6,609 1,044
Cherokee County 56.8 6,593 525
Grundy County 53.0 6,543 1,202
Chickasaw County 53.4 6,420 1,105
Shelby County 54.2 6,372 928
Guthrie County 56.9 6,035 515
Union County 49.5 6,032 2,068
Hancock County 54.9 5,952 792
Louisa County 52.7 5,742 1,277
Lyon County 47.6 5,684 2,409
Mitchell County 52.7 5,552 1,271
Sac County 56.1 5,513 614
Winnebago County 51.3 5,506 1,640
Franklin County 54.3 5,465 898
Montgomery County 52.5 5,426 1,323
Keokuk County 53.9 5,413 1,010
Calhoun County 53.0 5,280 1,212
Humboldt County 52.2 5,018 1,415
Emmet County 53.1 5,005 1,195
Monona County 55.7 4,862 663
Greene County 54.7 4,828 842
Howard County 50.4 4,767 1,868
Palo Alto County 52.3 4,701 1,388
Lucas County 53.9 4,662 995
Clarke County 47.7 4,644 2,389
Davis County 45.2 4,094 2,693
Worth County 54.7 4,074 839
Van Buren County 55.7 4,010 652
Adair County 53.1 3,947 1,196
Monroe County 51.6 3,913 1,574
Pocahontas County 54.9 3,891 805
Fremont County 56.1 3,763 605
Ida County 51.5 3,592 1,597
Decatur County 45.8 3,538 2,608
Wayne County 51.6 3,359 1,547
Osceola County 54.3 3,350 907
Audubon County 56.8 3,211 530
Taylor County 53.7 3,188 1,033
Ringgold County 53.8 2,548 1,028
Adams County 55.9 2,065 639
Notes:
Created by statecancerprofiles.cancer.gov on 03/02/2024 1:15 am.
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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