Counties in Iowa Polk County (Des Moines) Linn County (Cedar Rapids) Scott County (Davenport) Johnson County (Iowa City) Black Hawk County (Waterloo) Woodbury County (Sioux City) Dallas County (Adel) Dubuque County (Dubuque) Story County (Nevada) Pottawattamie County (Council Bluffs) Warren County (Indianola) Clinton County (Clinton) Muscatine County (Muscatine) Cerro Gordo County (Mason City) Marshall County (Marshalltown) Des Moines County (Burlington) Jasper County (Newton) Webster County (Fort Dodge) Sioux County (Orange City) Wapello County (Ottumwa) Lee County (Fort Madison) Marion County (Knoxville) Boone County (Boone) Plymouth County (Le Mars) Benton County (Vinton) Bremer County (Waverly) Washington County (Washington) Mahaska County (Oskaloosa) Buena Vista County (Storm Lake) Carroll County (Carroll) Jones County (Anamosa) Buchanan County (Independence) Henry County (Mount Pleasant) Winneshiek County (Decorah) Fayette County (West Union) Jackson County (Maquoketa) Poweshiek County (Montezuma) Cedar County (Tipton) Dickinson County (Spirit Lake) Delaware County (Manchester) Tama County (Toledo) Clayton County (Elkader) Hardin County (Eldora) Iowa County (Marengo) Madison County (Winterset) Crawford County (Denison) Clay County (Spencer) Jefferson County (Fairfield) Floyd County (Charles City) Page County (Clarinda) Hamilton County (Webster City) Kossuth County (Algona) Harrison County (Logan) Mills County (Glenwood) Butler County (Allison) OBrien County (Primghar) Allamakee County (Waukon) Cass County (Atlantic) Wright County (Clarion) Grundy County (Grundy Center) Appanoose County (Centerville) Union County (Creston) Chickasaw County (New Hampton) Lyon County (Rock Rapids) Shelby County (Harlan) Cherokee County (Cherokee) Louisa County (Wapello) Hancock County (Garner) Winnebago County (Forest City) Guthrie County (Guthrie Center) Mitchell County (Osage) Montgomery County (Red Oak) Keokuk County (Sigourney) Franklin County (Hampton) Calhoun County (Rockwell City) Sac County (Sac City) Clarke County (Osceola) Humboldt County (Dakota City) Howard County (Cresco) Emmet County (Estherville) Davis County (Bloomfield) Palo Alto County (Emmetsburg) Greene County (Jefferson) Monona County (Onawa) Lucas County (Chariton) Decatur County (Leon) Monroe County (Albia) Adair County (Greenfield) Worth County (Northwood) Van Buren County (Keosauqua) Pocahontas County (Pocahontas) Ida County (Ida Grove) Fremont County (Sidney) Wayne County (Corydon) Osceola County (Sibley) Taylor County (Bedford) Audubon County (Audubon) Ringgold County (Mount Ayr) Adams County (Corning)