These are tables of congressional delegations from Iowa to the United States House of Representatives and the United States Senate.
The current dean of the Iowa delegation is Senator and President pro tempore emeritus Chuck Grassley, having served in the Senate since 1981 and in Congress since 1975.
List of members of the Iowan United States House delegation, their terms in office, district boundaries, and the district political ratings according to the CPVI. The delegation has a total of 4 members, including 3 Republican and 1 Democrat.
|Marion||Republican||January 3, 2021|
|Ottumwa||Republican||January 3, 2021|
|West Des Moines||Democratic||January 3, 2019|
|Hull||Republican||January 3, 2021|
On July 4, 1838, the Iowa Territory was organized. Most of the area comprising the territory was originally part of the Louisiana Purchase and was a part of the Missouri Territory. When Missouri became a state in 1821, this area (along with the Dakotas) effectively became unorganized territory. The area was closed to white settlers until the 1830s, after the Black Hawk War ended. It was attached to the Michigan Territory on June 28, 1834, and was split off with the Wisconsin Territory in 1836 when Michigan became a state.
The Iowa Territory was the "Iowa District" of western Wisconsin Territory – the region west of the Mississippi River. The original boundaries of the territory, as established in 1838, included part of Minnesota and parts of the Dakotas, covering about 194,000 square miles (500,000 km2) of land.
|William W. Chapman||September 10, 1838 – October 27, 1840||Democratic|
|Augustus C. Dodge||October 28, 1840 – December 28, 1846||Democratic|
|Congress||Elected at-large, statewide on a general ticket|
|1st seat||2nd seat|
|29th (1845–1847)||Serranus Clinton
|Shepherd Leffler (D)|
|30th (1847–1849)||William Thompson (D)||Shepherd Leffler (D)|
|Daniel F. Miller (W)|
|32nd (1851–1853)||Bernhart Henn (D)||Lincoln Clark (D)|
|33rd (1853–1855)||John Parsons Cook (W)|
|34th (1855–1857)||Augustus Hall (D)||James Thorington (W)|
|35th (1857–1859)||Samuel Ryan Curtis (R)||Timothy Davis (R)|
|36th (1859–1861)||William Vandever (R)|
|James F. Wilson (R)|
|38th (1863–1865)||James F.
|Hiram Price (R)||William B. Allison (R)||Josiah Bushnell
|John A. Kasson (R)||Asahel W.|
|Grenville M. Dodge (R)|
|41st (1869–1871)||George W.
|William Smyth (R)||Francis W. Palmer (R)||Charles Pomeroy (R)|
|William P. Wolf (R)|
|42nd (1871–1873)||Aylett R. Cotton (R)||William G. Donnan (R)||Madison M. Walden (R)||Jackson Orr (R)|
|43rd (1873–1875)||George W.
|Aylett R. Cotton (R)||William G. Donnan (R)||Henry Otis
|James Wilson (R)||William Loughridge (R)||John A. Kasson (R)||James W.
|Jackson Orr (R)|
|44th (1875–1877)||John Q. Tufts (R)||L. L. Ainsworth (D)||Ezekiel S.
|45th (1877–1879)||Joseph Champlin
|Hiram Price (R)||Theodore Weld
|Rush Clark (R)||Henry J. B.
|46th (1879–1881)||Moses A.
|James B. Weaver (GB)||Edward H. Gillette (GB)||Cyrus C.|
|47th (1881–1883)||Sewall S. Farwell (R)||Marsena E. Cutts (R)||John A. Kasson (R)||William Peters|
|John C. Cook (D)|
|48th (1883–1885)||Moses A.
|Jim Wilson (R)||Marsena E.
Mills Pusey (D)
|John Cook (D)||Hiram Smith (R)|
|49th (1885–1887)||Ben Hall (D)||William E.
|50th (1887–1889)||John H.
|Daniel Kerr (R)||Albert R.|
|51st (1889–1891)||Joseph Henry
|Edward Hays (R)|
|52nd (1891–1893)||John Joseph
|John A. T.
|53rd (1893–1895)||John Gear (R)||Thomas
|54th (1895–1897)||Samuel M.
|Joe Lane (R)||Gilbert N.
|57th (1901–1903)||John Rumple (R)|
|58th (1903–1905)||Martin Wade (D)||Benjamin P.|
|59th (1905–1907)||Albert F.
|60th (1907–1909)||Charles A.
|61st (1909–1911)||Charles E.
|62nd (1911–1913)||Irvin S.
|Henry Vollmer (D)|
|64th (1915–1917)||Harry E.
|65th (1917–1919)||George C.|
|66th (1919–1921)||Lester J.
|67th (1921–1923)||William F.|
|68th (1923–1925)||Thomas J. B.|
|Hiram Evans (R)|
|69th (1925–1927)||F. Dickinson
|Earl Vincent (R)|
|72nd (1931–1933)||Bernhard M.
|73rd (1933–1935)||Edward C.
|Albert Willford (D)||Fred
|Cassius C. Dowell (R)||Otha
|Guy Gillette (D)|
|74th (1935–1937)||John W.
|Hubert Utterback (D)|
|75th (1937–1939)||William S.
|Cassius C. Dowell (R)||Vincent F.|
|76th (1939–1941)||Thomas E.
|Harry Narey (R)|
|78th (1943–1945)||Thomas E.
|79th (1945–1947)||James I.|
|81st (1949–1951)||H. R.|
|86th (1959–1961)||Leonard G.
|87th (1961–1963)||James E.
|88th (1963–1965)||Charles B.|
|89th (1965–1967)||John R.
|John Culver (D)||H. R. Gross (R)||Neal
|William Scherle (R)||Wiley Mayne (R)|
|94th (1975–1977)||Mike Blouin (D)||Chuck
|Tom Harkin (D)||Berkley|
|95th (1977–1979)||Jim Leach (R)|
|96th (1979–1981)||Tom Tauke (R)|
|97th (1981–1983)||T. Cooper|
|99th (1985–1987)||Jim Ross|
|Fred Grandy (R)|
|102nd (1991–1993)||Jim Nussle (R)|
|103rd (1993–1995)||Jim Leach (R)||Jim Nussle (R)||Jim Ross
|Neal Smith (D)||Fred Grandy (R)|
|104th (1995–1997)||Greg Ganske (R)||Tom Latham (R)|
|108th (2003–2005)||Jim Nussle (R)||Jim Leach (R)||Tom Latham (R)||Steve King (R)|
|110th (2007–2009)||Bruce Braley (D)||Dave|
|113th (2013–2015)||Bruce Braley (D)||Dave
|Tom Latham (R)||Steve King (R)|
|114th (2015–2017)||Rod Blum (R)||David Young (R)|
|116th (2019–2021)||Abby Finkenauer (D)||Cindy Axne (D)|
|117th (2021–2023)||Ashley Hinson (R)||Mariannette
|Randy Feenstra (R)|
Main article: List of United States senators from Iowa
|Class II senators||Congress||Class III senators|
|30th (1847–1849)||Augustus C. Dodge (D)|
|34th (1855–1857)||James Harlan (R)|
|James W. Grimes (R)||36th (1859–1861)|
|Samuel J. Kirkwood (R)|
|40th (1867–1869)||James Harlan (R)|
|James B. Howell (R)|
|George G. Wright (R)||42nd (1871–1873)|
|43rd (1873–1875)||William B. Allison (R)|
|Samuel J. Kirkwood (R)||45th (1877–1879)|
|James W. McDill (R)|
|James F. Wilson (R)||48th (1883–1885)|
|John H. Gear (R)||54th (1895–1897)|
|Jonathan P. Dolliver (R)|
|Albert B. Cummins (R)|
|Lafayette Young (R)|
|William S. Kenyon (R)|
|Charles A. Rawson (R)|
|Smith W. Brookhart (R)|
|Daniel F. Steck (D)||David W. Stewart (R)|
|70th (1927–1929)||Smith W. Brookhart (R)|
|Lester J. Dickinson (R)||72nd (1931–1933)|
|73rd (1933–1935)||Richard L. Murphy (D)|
|Guy Gillette (D)|
|Clyde L. Herring (D)||75th (1937–1939)|
|George A. Wilson (R)||78th (1943–1945)|
|79th (1945–1947)||Bourke B.|
|Guy Gillette (D)||81st (1949–1951)|
|Thomas E. Martin (R)||84th (1955–1957)|
|Jack Miller (R)||87th (1961–1963)|
|91st (1969–1971)||Harold Hughes (D)|
|Dick Clark (D)||93rd (1973–1975)|
|94th (1975–1977)||John Culver (D)|
|Roger Jepsen (R)||96th (1979–1981)|
|97th (1981–1983)||Chuck Grassley (R)|
|Tom Harkin (D)||99th (1985–1987)|
|Joni Ernst (R)||114th (2015–2017)|