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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
2015-2019 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 3146 counties)
 sort by rank ascending
United States 47.6 154,520,356 N/A
Iowa 47.7 1,498,923 27 of 52
Polk County 43.6 209,158 2,811
Linn County 46.8 104,877 2,493
Scott County 47.7 82,203 2,371
Black Hawk County 43.9 58,073 2,793
Johnson County 36.7 54,566 3,086
Dubuque County 48.7 47,250 2,209
Pottawattamie County 49.6 46,315 2,031
Woodbury County 44.5 45,661 2,738
Dallas County 41.5 36,181 2,937
Story County 33.5 32,510 3,123
Clinton County 52.7 24,733 1,285
Warren County 47.8 23,913 2,354
Cerro Gordo County 54.5 23,358 871
Des Moines County 53.2 20,938 1,190
Muscatine County 47.5 20,355 2,405
Marshall County 48.6 19,426 2,226
Jasper County 52.2 19,298 1,415
Lee County 53.5 18,306 1,112
Webster County 48.9 17,879 2,163
Wapello County 49.3 17,334 2,078
Marion County 49.1 16,297 2,121
Sioux County 41.7 14,528 2,925
Boone County 52.4 13,810 1,384
Benton County 52.7 13,501 1,309
Plymouth County 50.0 12,541 1,945
Bremer County 49.8 12,389 1,983
Washington County 50.5 11,170 1,830
Jones County 53.6 11,020 1,075
Mahaska County 49.4 10,939 2,069
Carroll County 52.5 10,653 1,342
Fayette County 53.4 10,582 1,119
Jackson County 54.1 10,495 967
Winneshiek County 51.8 10,491 1,512
Buchanan County 49.1 10,372 2,125
Clayton County 56.7 9,993 534
Jefferson County 55.0 9,980 795
Dickinson County 58.3 9,977 378
Cedar County 53.9 9,950 1,010
Henry County 49.6 9,890 2,030
Hardin County 55.0 9,383 793
Poweshiek County 50.8 9,348 1,761
Delaware County 53.9 9,269 1,000
Tama County 53.0 9,031 1,217
Buena Vista County 43.7 8,756 2,808
Clay County 53.6 8,686 1,084
Iowa County 52.8 8,549 1,266
Floyd County 53.7 8,481 1,050
Page County 54.3 8,283 933
Crawford County 48.5 8,256 2,246
Kossuth County 54.9 8,218 819
Madison County 50.8 8,136 1,774
Hamilton County 53.6 8,041 1,067
Butler County 55.0 8,040 802
Mills County 52.5 7,894 1,347
Harrison County 54.3 7,655 915
Allamakee County 54.5 7,527 879
O'Brien County 53.5 7,408 1,089
Cass County 56.1 7,348 610
Appanoose County 55.1 6,864 777
Wright County 52.8 6,721 1,274
Chickasaw County 55.0 6,613 797
Grundy County 53.5 6,579 1,109
Shelby County 55.6 6,453 685
Cherokee County 55.8 6,330 658
Union County 50.3 6,211 1,903
Guthrie County 55.6 5,936 679
Hancock County 54.7 5,910 848
Louisa County 52.2 5,831 1,420
Mitchell County 54.3 5,759 924
Lyon County 47.5 5,589 2,404
Montgomery County 55.5 5,577 707
Sac County 56.6 5,549 544
Keokuk County 54.2 5,525 938
Winnebago County 52.0 5,475 1,467
Franklin County 53.2 5,405 1,179
Calhoun County 54.4 5,304 894
Emmet County 53.3 5,033 1,140
Humboldt County 52.6 5,021 1,334
Greene County 55.0 4,922 794
Monona County 56.3 4,914 587
Howard County 51.6 4,759 1,566
Clarke County 50.4 4,713 1,879
Lucas County 54.6 4,688 861
Palo Alto County 51.4 4,627 1,614
Monroe County 54.0 4,217 987
Davis County 45.9 4,092 2,596
Worth County 54.6 4,067 857
Van Buren County 55.7 3,981 676
Fremont County 57.1 3,963 506
Pocahontas County 57.8 3,927 428
Adair County 55.4 3,923 723
Ida County 53.8 3,715 1,023
Decatur County 46.2 3,683 2,568
Wayne County 52.7 3,386 1,306
Osceola County 53.8 3,256 1,030
Taylor County 52.4 3,231 1,378
Audubon County 57.4 3,200 467
Ringgold County 54.0 2,681 989
Adams County 56.5 2,072 567
Notes:
Created by statecancerprofiles.cancer.gov on 12/03/2022 12:45 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.
Health Service Areas are a single county or cluster of contiguous counties which are relatively self-contained with respect to hospital care. For more detailed information, please see Health Service Area information page. Puerto Rico is being treated as a Health Service Area for this data presentation.
Data for United States does not include Puerto Rico.

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