District 1 Allamakee, Blackhawk, Bemer, Buchanan, Chickasaw, Clayton, Delaware, Dubuque, Fayette, Howard, Winneshiek
District 2 Benton, Cedar, Clinton, Iowa, Jackson, Johnson, Jones, Linn, Muscatine, Scott, Tama
District 3 Appanoose, Davis, Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa, Lucas, Monroe, Van Buren, Wapello, Washington, Wayne
District 4 Adair, Adams, Audubon, Cass, Clark, Decatur, Fremont, Harrison, Madison, Mills, Montgomery, Page, Pottawattamie, Ringgold, Shelby, Taylor, Union
District 5 Boone, Dallas, Greene, Guthrie, Jasper, Mahaska, Marion, Marshall, Polk, Poweshiek, Story, Warren
District 6 Buena Vista, Carroll, Cherokee, Clay, Crawford, Dickinson, Emmet, Ida, Lyon, Monona, O’Brien, Osceola, Palo Alto, Plymouth, Pocahontas, Sac, Sioux, Woodbury
District 7 Butler, Calhoun, Cerro Gordo, Floyd, Franklin, Grundy, Hamilton, Hancock, Hardin, Humboldt, Kossuth, Mitchell, Webster Winnebago, Worth, Wright