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Interpretation of Demographics Data

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

United States

Value (Percent) : The value is 47.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 157,871,085.
Rank within US : N/A

Iowa

Value (Percent) : The value is 47.8 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 1,518,059.
Rank within US : This state is ranked 31 of 52

Polk County

Value (Percent) : The value is 43.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 214,394.
Rank within US : This county is ranked 2805 of 3143

Linn County

Value (Percent) : The value is 47.4 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 108,242.
Rank within US : This county is ranked 2435 of 3143

Scott County

Value (Percent) : The value is 48.2 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 83,889.
Rank within US : This county is ranked 2311 of 3143

Black Hawk County

Value (Percent) : The value is 44.3 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 58,183.
Rank within US : This county is ranked 2779 of 3143

Johnson County

Value (Percent) : The value is 37.6 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 57,140.
Rank within US : This county is ranked 3075 of 3143

Dubuque County

Value (Percent) : The value is 48.2 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 47,568.
Rank within US : This county is ranked 2303 of 3143

Woodbury County

Value (Percent) : The value is 44.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 47,217.
Rank within US : This county is ranked 2716 of 3143

Pottawattamie County

Value (Percent) : The value is 49.3 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 46,166.
Rank within US : This county is ranked 2095 of 3143

Dallas County

Value (Percent) : The value is 42.1 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 40,633.
Rank within US : This county is ranked 2920 of 3143

Story County

Value (Percent) : The value is 34.3 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 33,643.
Rank within US : This county is ranked 3119 of 3143

Warren County

Value (Percent) : The value is 48.0 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 24,884.
Rank within US : This county is ranked 2336 of 3143

Clinton County

Value (Percent) : The value is 52.8 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 24,580.
Rank within US : This county is ranked 1267 of 3143

Cerro Gordo County

Value (Percent) : The value is 54.3 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 23,466.
Rank within US : This county is ranked 900 of 3143

Des Moines County

Value (Percent) : The value is 52.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 20,663.
Rank within US : This county is ranked 1239 of 3143

Muscatine County

Value (Percent) : The value is 47.5 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 20,496.
Rank within US : This county is ranked 2414 of 3143

Marshall County

Value (Percent) : The value is 48.2 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 19,350.
Rank within US : This county is ranked 2302 of 3143

Jasper County

Value (Percent) : The value is 51.1 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 19,274.
Rank within US : This county is ranked 1666 of 3143

Lee County

Value (Percent) : The value is 53.8 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 18,156.
Rank within US : This county is ranked 1016 of 3143

Webster County

Value (Percent) : The value is 48.8 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 18,120.
Rank within US : This county is ranked 2185 of 3143

Wapello County

Value (Percent) : The value is 49.4 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 17,442.
Rank within US : This county is ranked 2092 of 3143

Marion County

Value (Percent) : The value is 49.5 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 16,516.
Rank within US : This county is ranked 2067 of 3143

Sioux County

Value (Percent) : The value is 42.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 15,294.
Rank within US : This county is ranked 2872 of 3143

Boone County

Value (Percent) : The value is 52.6 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 14,065.
Rank within US : This county is ranked 1288 of 3143

Benton County

Value (Percent) : The value is 53.4 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 13,688.
Rank within US : This county is ranked 1117 of 3143

Plymouth County

Value (Percent) : The value is 50.5 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 12,889.
Rank within US : This county is ranked 1856 of 3143

Bremer County

Value (Percent) : The value is 48.6 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 12,082.
Rank within US : This county is ranked 2237 of 3143

Washington County

Value (Percent) : The value is 50.3 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 11,320.
Rank within US : This county is ranked 1904 of 3143

Jones County

Value (Percent) : The value is 54.1 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 11,198.
Rank within US : This county is ranked 941 of 3143

Carroll County

Value (Percent) : The value is 52.3 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 10,854.
Rank within US : This county is ranked 1376 of 3143

Mahaska County

Value (Percent) : The value is 48.5 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 10,738.
Rank within US : This county is ranked 2247 of 3143

Jackson County

Value (Percent) : The value is 54.0 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 10,533.
Rank within US : This county is ranked 968 of 3143

Henry County

Value (Percent) : The value is 50.8 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 10,400.
Rank within US : This county is ranked 1777 of 3143

Winneshiek County

Value (Percent) : The value is 51.6 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 10,365.
Rank within US : This county is ranked 1569 of 3143

Fayette County

Value (Percent) : The value is 52.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 10,358.
Rank within US : This county is ranked 1232 of 3143

Dickinson County

Value (Percent) : The value is 58.8 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 10,316.
Rank within US : This county is ranked 327 of 3143

Buchanan County

Value (Percent) : The value is 49.0 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 10,084.
Rank within US : This county is ranked 2161 of 3143

Cedar County

Value (Percent) : The value is 52.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 9,781.
Rank within US : This county is ranked 1240 of 3143

Clayton County

Value (Percent) : The value is 56.5 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 9,698.
Rank within US : This county is ranked 560 of 3143

Delaware County

Value (Percent) : The value is 54.5 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 9,534.
Rank within US : This county is ranked 871 of 3143

Poweshiek County

Value (Percent) : The value is 50.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 9,481.
Rank within US : This county is ranked 1736 of 3143

Hardin County

Value (Percent) : The value is 55.4 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 9,410.
Rank within US : This county is ranked 701 of 3143

Buena Vista County

Value (Percent) : The value is 44.4 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 9,194.
Rank within US : This county is ranked 2771 of 3143

Iowa County

Value (Percent) : The value is 53.7 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 8,918.
Rank within US : This county is ranked 1036 of 3143

Tama County

Value (Percent) : The value is 51.6 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 8,811.
Rank within US : This county is ranked 1561 of 3143

Clay County

Value (Percent) : The value is 51.4 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 8,434.
Rank within US : This county is ranked 1614 of 3143

Page County

Value (Percent) : The value is 55.1 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 8,405.
Rank within US : This county is ranked 751 of 3143

Floyd County

Value (Percent) : The value is 53.6 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 8,401.
Rank within US : This county is ranked 1058 of 3143

Jefferson County

Value (Percent) : The value is 52.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 8,378.
Rank within US : This county is ranked 1244 of 3143

Madison County

Value (Percent) : The value is 50.8 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 8,334.
Rank within US : This county is ranked 1773 of 3143

Kossuth County

Value (Percent) : The value is 54.4 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 8,062.
Rank within US : This county is ranked 887 of 3143

Hamilton County

Value (Percent) : The value is 53.2 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 8,021.
Rank within US : This county is ranked 1156 of 3143

Butler County

Value (Percent) : The value is 54.4 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 7,841.
Rank within US : This county is ranked 892 of 3143

Mills County

Value (Percent) : The value is 52.6 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 7,713.
Rank within US : This county is ranked 1296 of 3143

Harrison County

Value (Percent) : The value is 52.4 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 7,644.
Rank within US : This county is ranked 1356 of 3143

Crawford County

Value (Percent) : The value is 46.0 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 7,616.
Rank within US : This county is ranked 2588 of 3143

Allamakee County

Value (Percent) : The value is 54.0 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 7,596.
Rank within US : This county is ranked 974 of 3143

Cass County

Value (Percent) : The value is 56.0 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 7,372.
Rank within US : This county is ranked 621 of 3143

O'Brien County

Value (Percent) : The value is 50.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 7,201.
Rank within US : This county is ranked 1729 of 3143

Wright County

Value (Percent) : The value is 52.7 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 6,841.
Rank within US : This county is ranked 1279 of 3143

Appanoose County

Value (Percent) : The value is 53.7 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 6,609.
Rank within US : This county is ranked 1044 of 3143

Cherokee County

Value (Percent) : The value is 56.8 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 6,593.
Rank within US : This county is ranked 525 of 3143

Grundy County

Value (Percent) : The value is 53.0 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 6,543.
Rank within US : This county is ranked 1202 of 3143

Chickasaw County

Value (Percent) : The value is 53.4 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 6,420.
Rank within US : This county is ranked 1105 of 3143

Shelby County

Value (Percent) : The value is 54.2 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 6,372.
Rank within US : This county is ranked 928 of 3143

Guthrie County

Value (Percent) : The value is 56.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 6,035.
Rank within US : This county is ranked 515 of 3143

Union County

Value (Percent) : The value is 49.5 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 6,032.
Rank within US : This county is ranked 2068 of 3143

Hancock County

Value (Percent) : The value is 54.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,952.
Rank within US : This county is ranked 792 of 3143

Louisa County

Value (Percent) : The value is 52.7 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,742.
Rank within US : This county is ranked 1277 of 3143

Lyon County

Value (Percent) : The value is 47.6 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,684.
Rank within US : This county is ranked 2409 of 3143

Mitchell County

Value (Percent) : The value is 52.7 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,552.
Rank within US : This county is ranked 1271 of 3143

Sac County

Value (Percent) : The value is 56.1 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,513.
Rank within US : This county is ranked 614 of 3143

Winnebago County

Value (Percent) : The value is 51.3 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,506.
Rank within US : This county is ranked 1640 of 3143

Franklin County

Value (Percent) : The value is 54.3 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,465.
Rank within US : This county is ranked 898 of 3143

Montgomery County

Value (Percent) : The value is 52.5 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,426.
Rank within US : This county is ranked 1323 of 3143

Keokuk County

Value (Percent) : The value is 53.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,413.
Rank within US : This county is ranked 1010 of 3143

Calhoun County

Value (Percent) : The value is 53.0 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,280.
Rank within US : This county is ranked 1212 of 3143

Humboldt County

Value (Percent) : The value is 52.2 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,018.
Rank within US : This county is ranked 1415 of 3143

Emmet County

Value (Percent) : The value is 53.1 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 5,005.
Rank within US : This county is ranked 1195 of 3143

Monona County

Value (Percent) : The value is 55.7 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 4,862.
Rank within US : This county is ranked 663 of 3143

Greene County

Value (Percent) : The value is 54.7 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 4,828.
Rank within US : This county is ranked 842 of 3143

Howard County

Value (Percent) : The value is 50.4 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 4,767.
Rank within US : This county is ranked 1868 of 3143

Palo Alto County

Value (Percent) : The value is 52.3 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 4,701.
Rank within US : This county is ranked 1388 of 3143

Lucas County

Value (Percent) : The value is 53.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 4,662.
Rank within US : This county is ranked 995 of 3143

Clarke County

Value (Percent) : The value is 47.7 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 4,644.
Rank within US : This county is ranked 2389 of 3143

Davis County

Value (Percent) : The value is 45.2 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 4,094.
Rank within US : This county is ranked 2693 of 3143

Worth County

Value (Percent) : The value is 54.7 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 4,074.
Rank within US : This county is ranked 839 of 3143

Van Buren County

Value (Percent) : The value is 55.7 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 4,010.
Rank within US : This county is ranked 652 of 3143

Adair County

Value (Percent) : The value is 53.1 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 3,947.
Rank within US : This county is ranked 1196 of 3143

Monroe County

Value (Percent) : The value is 51.6 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 3,913.
Rank within US : This county is ranked 1574 of 3143

Pocahontas County

Value (Percent) : The value is 54.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 3,891.
Rank within US : This county is ranked 805 of 3143

Fremont County

Value (Percent) : The value is 56.1 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 3,763.
Rank within US : This county is ranked 605 of 3143

Ida County

Value (Percent) : The value is 51.5 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 3,592.
Rank within US : This county is ranked 1597 of 3143

Decatur County

Value (Percent) : The value is 45.8 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 3,538.
Rank within US : This county is ranked 2608 of 3143

Wayne County

Value (Percent) : The value is 51.6 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 3,359.
Rank within US : This county is ranked 1547 of 3143

Osceola County

Value (Percent) : The value is 54.3 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 3,350.
Rank within US : This county is ranked 907 of 3143

Audubon County

Value (Percent) : The value is 56.8 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 3,211.
Rank within US : This county is ranked 530 of 3143

Taylor County

Value (Percent) : The value is 53.7 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 3,188.
Rank within US : This county is ranked 1033 of 3143

Ringgold County

Value (Percent) : The value is 53.8 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 2,548.
Rank within US : This county is ranked 1028 of 3143

Adams County

Value (Percent) : The value is 55.9 percent.
People (Age 40 And Over) : The number of people (age 40 and over) is 2,065.
Rank within US : This county is ranked 639 of 3143

Notes:
Created by statecancerprofiles.cancer.gov on 04/25/2024 7:16 pm.
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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