Iowa congressional district tables, 1847-2012

1 2 3 4 5 6 7 8 9 10 11
                     
1847 1847 1862 1862 1862- 2012 1862- 1992 1872- 1972 1872- 1962 1872- 1942 1882- 1932 1882- 1932

  1857 1862 1872 1882 1886 1932 1942 1962 1972 1982 1992 2002 2012
Adair
Adams
Allamakee
Appanoose
Audubon
Benton
Black Hawk
Boone
Bremer
Buchanan
Buena Vista
Butler
Calhoun
Carroll
Cass
Cedar
Cerro Gordo
Cherokee
Chickasaw
Clarke
Clay
Clayton
Clinton
Crawford
Dallas

1 2 3 4 5 6 7 8 9 10 11
                     
1847 1847 1862 1862 1862- 2012 1862- 1992 1872- 1972 1872- 1962 1872- 1942 1882- 1932 1882- 1932

  1857 1862 1872 1882 1886 1932 1942 1962 1972 1982 1992 2002 2012
Davis
Decatur
Delaware
Des Moines
Dickinson
Dubuque
Emmet
Fayette
Floyd
Franklin
Fremont
Greene
Grundy
Guthrie
Hamilton
Hancock
Hardin
Harrison
Henry
Howard
Humboldt
Ida
Iowa
Jackson
Jasper

1 2 3 4 5 6 7 8 9 10 11
                     
1847 1847 1862 1862 1862- 2012 1862- 1992 1872- 1972 1872- 1962 1872- 1942 1882- 1932 1882- 1932

  1857 1862 1872 1882 1886 1932 1942 1962 1972 1982 1992 2002 2012
Jefferson
Johnson
Jones
Keokuk
Kossuth
Lee
Linn
Louisa
Lucas
Lyon
Madison
Mahaska
Marion
Marshall
Mills
Mitchell
Monona
Monroe
Montgomery
Muscatine
O'Brien
Osceola
Page
Palo Alto
Plymouth

1 2 3 4 5 6 7 8 9 10 11
                     
1847 1847 1862 1862 1862- 2012 1862- 1992 1872- 1972 1872- 1962 1872- 1942 1882- 1932 1882- 1932

  1857 1862 1872 1882 1886 1932 1942 1962 1972 1982 1992 2002 2012
Pocahontas
Polk
Pottawattamie
Poweshiek
Ringgold
Sac
Scott
Shelby
Sioux
Story
Tama
Taylor
Union
Van Buren
Wapello
Warren
Washington
Wayne
Webster
Winnebago
Winneshiek
Woodbury
Worth
Wright

Sources: The Historical Atlas of United States Congressional Districts, 1789-1983; The Des Moines Register, 8/13/81; Iowa Legislature website

Always together since 1862 (1-exception counties noted):

The 2012 redistricting created a second exception for these county sets:

Always together in 20th Cty. redistricting (1932-92): Northwest 11, southwest 7 plus Harrison/Shelby/Audubon/ Guthrie/Adair, Greene/Carroll, north-central 5, Hardin/Franklin, Allamakee/Fayette/Clayton/Delaware, Louisa/Muscatine, southeast 6; Black Hawk/Butler/Bremer/Grundy, Union/Clarke/Ringgold/Decatur/Wayne, Linn/Jones/Clinton, Dubuque/Jackson, Mitchell/Howard/Floyd/Chickasaw/Worth, Page/Taylor, Keokuk/Mahaska/Lucas/Monroe/Wapello/Davis/Appanoose

Always together UNTIL 1981: NW 12; SW 7; SE 7; NE 4; Emmet, Palo Alto, Pocahontas, Calhoun; Jasper, Keokuk, Mahaska, Monroe, Wapello; Adams, Page, Taylor; Clarke, Decatur, Wayne; Winneshiek, Allamakee, Fayette, Clayton; Dallas, Madison, Greene, Carroll; Jackson, Clinton; Butler, Black Hawk; Iowa, Johnson; Hardin, Franklin.

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Page created 5/3/05; last updated 12/6/11