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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
2020-2024 American Community Survey 5-Year Data
Sorted by Percent

United States


Iowa


Polk County


Linn County


Scott County


Johnson County


Black Hawk County


Woodbury County


Dubuque County


Dallas County


Pottawattamie County


Story County


Warren County


Clinton County


Cerro Gordo County


Muscatine County


Des Moines County


Jasper County


Marshall County


Webster County


Lee County


Wapello County


Marion County


Sioux County


Boone County


Benton County


Plymouth County


Bremer County


Washington County


Jones County


Dickinson County


Mahaska County


Jackson County


Carroll County


Winneshiek County


Buchanan County


Fayette County


Henry County


Cedar County


Clayton County


Delaware County


Poweshiek County


Hardin County


Buena Vista County


Iowa County


Tama County


Clay County


Madison County


Jefferson County


Page County


Floyd County


Crawford County


Kossuth County


Hamilton County


Butler County


Mills County


Harrison County


Allamakee County


Cass County


O'Brien County


Cherokee County


Appanoose County


Grundy County


Shelby County


Chickasaw County


Wright County


Guthrie County


Union County


Hancock County


Lyon County


Louisa County


Mitchell County


Winnebago County


Montgomery County


Sac County


Franklin County


Keokuk County


Calhoun County


Humboldt County


Emmet County


Greene County


Palo Alto County


Monona County


Lucas County


Howard County


Clarke County


Davis County


Worth County


Van Buren County


Adair County


Monroe County


Fremont County


Pocahontas County


Decatur County


Ida County


Wayne County


Audubon County


Osceola County


Taylor County


Ringgold County


Adams County





Notes:
Created by statecancerprofiles.cancer.gov on 03/30/2026 3:15 pm.

Φ Rural–urban county classifications are based on the 2023 USDA Rural–Urban Continuum Codes (except for Connecticut Counties which use 2013 codes). State-level cancer rates for rural areas are calculated using cancer cases registered exclusively in rural counties, while state-level cancer rates for urban areas are calculated using cases registered exclusively in urban counties.

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.