Iowa congressional district tables, 1847-2013
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| 1847 |
1847 |
1862 |
1862 |
1862- 2012 |
1862- 1992 |
1872- 1972 |
1872- 1962 |
1872- 1942 |
1882- 1932 |
1882- 1932 |
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1857 |
1862 |
1872 |
1882 |
1886 |
1932 |
1942 |
1962 |
1972 |
1982 |
1992 |
2002 |
| Adair |
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| Adams |
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| Allamakee |
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| Appanoose |
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| Audubon |
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| Benton |
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| Black Hawk |
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| Boone |
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| Bremer |
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| Buchanan |
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| Buena Vista |
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| Butler |
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| Calhoun |
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| Carroll |
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| Cass |
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| Cedar |
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| Cerro Gordo |
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| Cherokee |
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| Chickasaw |
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| Clarke |
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| Clay |
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| Clayton |
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| Clinton |
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| Crawford |
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| Dallas |
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| 1847 |
1847 |
1862 |
1862 |
1862- 2012 |
1862- 1992 |
1872- 1972 |
1872- 1962 |
1872- 1942 |
1882- 1932 |
1882- 1932 |
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1857 |
1862 |
1872 |
1882 |
1886 |
1932 |
1942 |
1962 |
1972 |
1982 |
1992 |
2002 |
| Davis |
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| Decatur |
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| Delaware |
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| Des Moines |
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| Dickinson |
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| Dubuque |
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| Emmet |
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| Fayette |
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| Floyd |
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| Franklin |
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| Fremont |
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| Greene |
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| Grundy |
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| Guthrie |
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| Hamilton |
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| Hancock |
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| Hardin |
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| Harrison |
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| Henry |
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| Howard |
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| Humboldt |
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| Ida |
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| Iowa |
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| Jackson |
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| Jasper |
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| 1847 |
1847 |
1862 |
1862 |
1862- 2012 |
1862- 1992 |
1872- 1972 |
1872- 1962 |
1872- 1942 |
1882- 1932 |
1882- 1932 |
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1857 |
1862 |
1872 |
1882 |
1886 |
1932 |
1942 |
1962 |
1972 |
1982 |
1992 |
2002 |
| Jefferson |
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| Johnson |
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| Jones |
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| Keokuk |
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| Kossuth |
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| Lee |
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| Linn |
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| Louisa |
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| Lucas |
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| Lyon |
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| Madison |
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| Mahaska |
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| Marion |
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| Marshall |
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| Mills |
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| Mitchell |
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| Monona |
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| Monroe |
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| Montgomery |
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| Muscatine |
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| O'Brien |
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| Osceola |
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| Page |
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| Palo Alto |
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| Plymouth |
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| 1847 |
1847 |
1862 |
1862 |
1862- 2012 |
1862- 1992 |
1872- 1972 |
1872- 1962 |
1872- 1942 |
1882- 1932 |
1882- 1932 |
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1857 |
1862 |
1872 |
1882 |
1886 |
1932 |
1942 |
1962 |
1972 |
1982 |
1992 |
2002 |
| Pocahontas |
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| Polk |
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| Pottawattamie |
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| Poweshiek |
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| Ringgold |
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| Sac |
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| Scott |
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| Shelby |
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| Sioux |
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| Story |
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| Tama |
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| Taylor |
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| Union |
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| Van Buren |
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| Wapello |
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| Warren |
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| Washington |
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| Wayne |
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| Webster |
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| Winnebago |
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| Winneshiek |
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| Woodbury |
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| Worth |
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| Wright |
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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):
- 11: Lyon, Dickinson, Osceola, Sioux, O'Brien, Clay, Plymouth, Cherokee,
Buena Vista, Woodbury, Ida. Also Sac except 1981.
- 7: Harrison, Shelby, Audubon, Pottawattamie, Cass, Mills, Montgomery.
Also Fremont except 1886.
- 6: Washington, Jefferson, Henry, Des Moines, Lee, Van Buren. Also Louisa except 1992.
- 6 (almost): Emmet, Palo Alto, Pocahontas, Kossuth, Humboldt, Calhoun, except Kossuth
and Humboldt in 1882 and Calhoun in 1982.
- 5 (almost): Jasper, Keokuk, Mahaska, Monroe, Wapello, except Jasper in 1982 and Wapello
in 2002; Union, Ringgold, Clarke, Decatur, Wayne, except 1872 (split 2-3) and Wayne in 2002.
- 4: Mitchell, Howard, Floyd, Chickasaw.
- 4 (almost): Union, Ringgold, Clarke, Decatur, except 1872 (split 2-2); Emmet, Palo Alto,
Pocahontas, Calhoun, except Calhoun in 1982.
- 3: Emmet, Palo Alto, Pocahontas; Keokuk, Mahaska, Monroe; Adams, Taylor, Page.
- 3 (almost): Butler, Bremer, Black Hawk, except Bremer in 1862; Hardin, Franklin,
Wright, except Wright in 1942; Buchanan, Delaware, Dubuque, except Dubuque in 1932 and
Buchanan in 1972; Clarke, Decatur, Wayne except Wayne in 2002; Monroe, Wapello, Davis
except Davis in 1862 and Monroe in 2002; Allamakee, Clayton, Fayette, except Allamakee in 2002.
- 2: Butler/Black Hawk; Hardin/Franklin; Union/Ringgold; Clarke/Decatur; Fayette/Clayton;
Kossuth/Humboldt; Adair/Guthrie
- 2 with one exception: Greene/Carroll (2002); Jackson/Clinton (1992);
Allamakee/Winneshiek (1982); Jasper/Mahaska (1982); Winnebago/Hancock (1972);
Delaware/Dubuque (1932); Buchanan/Delaware (1972); Wapello/Davis (1862); Decatur/Wayne (2002);
Dallas/Madison (1982)
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