Counties in Iowa
Iowa has 99 counties. They are listed by population, largest first, starting with Polk County, Linn County, and Scott County.
- Polk County, Iowa
- Linn County, Iowa
- Scott County, Iowa
- Johnson County, Iowa
- Black Hawk County, Iowa
- Dallas County, Iowa
- Woodbury County, Iowa
- Story County, Iowa
- Dubuque County, Iowa
- Pottawattamie County, Iowa
- Warren County, Iowa
- Clinton County, Iowa
- Cerro Gordo County, Iowa
- Muscatine County, Iowa
- Marshall County, Iowa
- Jasper County, Iowa
- Des Moines County, Iowa
- Webster County, Iowa
- Sioux County, Iowa
- Wapello County, Iowa
- Marion County, Iowa
- Lee County, Iowa
- Boone County, Iowa
- Benton County, Iowa
- Plymouth County, Iowa
- Bremer County, Iowa
- Washington County, Iowa
- Mahaska County, Iowa
- Jones County, Iowa
- Buchanan County, Iowa
- Buena Vista County, Iowa
- Carroll County, Iowa
- Winneshiek County, Iowa
- Henry County, Iowa
- Jackson County, Iowa
- Fayette County, Iowa
- Poweshiek County, Iowa
- Cedar County, Iowa
- Dickinson County, Iowa
- Delaware County, Iowa
- Madison County, Iowa
- Clayton County, Iowa
- Tama County, Iowa
- Iowa County, Iowa
- Hardin County, Iowa
- Crawford County, Iowa
- Clay County, Iowa
- Jefferson County, Iowa
- Hamilton County, Iowa
- Floyd County, Iowa
- Page County, Iowa
- Mills County, Iowa
- Harrison County, Iowa
- Kossuth County, Iowa
- Allamakee County, Iowa
- O'Brien County, Iowa
- Butler County, Iowa
- Cass County, Iowa
- Wright County, Iowa
- Grundy County, Iowa
- Lyon County, Iowa
- Appanoose County, Iowa
- Union County, Iowa
- Shelby County, Iowa
- Chickasaw County, Iowa
- Cherokee County, Iowa
- Guthrie County, Iowa
- Mitchell County, Iowa
- Hancock County, Iowa
- Louisa County, Iowa
- Winnebago County, Iowa
- Montgomery County, Iowa
- Franklin County, Iowa
- Keokuk County, Iowa
- Clarke County, Iowa
- Calhoun County, Iowa
- Sac County, Iowa
- Howard County, Iowa
- Humboldt County, Iowa
- Davis County, Iowa
- Emmet County, Iowa
- Palo Alto County, Iowa
- Lucas County, Iowa
- Greene County, Iowa
- Monona County, Iowa
- Decatur County, Iowa
- Monroe County, Iowa
- Adair County, Iowa
- Worth County, Iowa
- Van Buren County, Iowa
- Pocahontas County, Iowa
- Ida County, Iowa
- Wayne County, Iowa
- Fremont County, Iowa
- Osceola County, Iowa
- Taylor County, Iowa
- Audubon County, Iowa
- Ringgold County, Iowa
- Adams County, Iowa