IOWA CONGRESSIONAL DISTRICTS AND COUNTIES 109th CONGRESSIONAL DISTRICT 1 Black Hawk Bremer Buchanan Butler Clayton Clinton Delaware Dubuque Fayette Jackson Jones Scott 109th CONGRESSIONAL DISTRICT 2 Appanoose Cedar Davis Des Moines Henry Jefferson Johnson Lee Linn Louisa Muscatine Van Buren Wapello Washington Wayne 109th CONGRESSIONAL DISTRICT 3 Benton Grundy Iowa Jasper Keokuk Lucas Mahaska Marion Monroe Polk Poweshiek Tama 109th CONGRESSIONAL DISTRICT 4 Allamakee Boone Calhoun Cerro Gordo Chickasaw Dallas Emmet Floyd Franklin Greene Hamilton Hancock Hardin Howard Humboldt Kossuth Madison Marshall Mitchell Palo Alto Pocahontas Story Warren Webster Winnebago Winneshiek Worth Wright 109th CONGRESSIONAL DISTRICT 5 Adair Adams Audubon Buena Vista Carroll Cass Cherokee Clarke Clay Crawford Decatur Dickinson Fremont Guthrie Harrison Ida Lyon Mills Monona Montgomery O'Brien Osceola Page Plymouth Pottawattamie Ringgold Sac Shelby Sioux Taylor Union Woodbury