The state of Iowa is hereby organized and divided into four congressional districts, which shall be composed, respectively, of the following counties:
 1. The first district shall consist of the counties of Cedar, Clinton, Des Moines, Henry, Iowa, Jackson, Jasper, Jefferson, Johnson, Jones, Keokuk, Lee, Louisa, Mahaska, Marion, Muscatine, Scott, Van Buren, Warren, and Washington.

Terms Used In Iowa Code 40.1

  • following: when used by way of reference to a chapter or other part of a statute mean the next preceding or next following chapter or other part. See Iowa Code 4.1
  • state: when applied to the different parts of the United States, includes the District of Columbia and the territories, and the words "United States" may include the said district and territories. See Iowa Code 4.1
 2. The second district shall consist of the counties of Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo, Chickasaw, Clayton, Delaware, Dubuque, Fayette, Floyd, Grundy, Hardin, Howard, Linn, Mitchell, Poweshiek, Tama, Winneshiek, and Worth.
 3. The third district shall consist of the counties of Adair, Adams, Appanoose, Cass, Clarke, Dallas, Davis, Decatur, Greene, Guthrie, Lucas, Madison, Monroe, Montgomery, Page, Polk, Ringgold, Taylor, Union, Wapello, and Wayne.
 4. The fourth district shall consist of the counties of Audubon, Boone, Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford, Dickinson, Emmet, Franklin, Fremont, Hamilton, Hancock, Harrison, Humboldt, Ida, Kossuth, Lyon, Marshall, Mills, Monona, O’Brien, Osceola, Palo Alto, Plymouth, Pocahontas, Pottawattamie, Sac, Shelby, Sioux, Story, Webster, Winnebago, Woodbury, and Wright.