Since Iowa became a U.S. state in 1846, it has sent congressional delegations to the United States Senate and United States House of Representatives. Each state elects two senators to serve for six years, and members of the House to two-year terms. Before becoming a state, the Iowa Territory elected a non-voting delegate at-large to Congress from 1838 to 1846.

These are tables of congressional delegations from Iowa to the United States Senate and the United States House of Representatives.

Current delegation Current U.S. senators from Iowa CPVI : Class II senator Class III senator Joni Ernst Chuck Grassley Party Incumbent since January 3, 2015 January 3, 1981 Iowa's current congressional delegation in the consists of its two senators and four representatives, all Republicans.

The current dean of the Iowa delegation is Senator and President pro tempore of the United States Senate Chuck Grassley, having served in the Senate since 1981 and in Congress since 1975.

United States Senate

Class II senatorCongress Class III senatorGeorge WallaceJones (D)30th Augustus C. Dodge (D)31st 32nd 33rd 34th James Harlan (R)35th James W. Grimes (R)36th 37th 38th 39th Samuel J. Kirkwood (R)40th James Harlan (R)41st James B. Howell (R)George G. Wright (R)42nd 43rd William B. Allison (R)44th Samuel J. Kirkwood (R)45th 46th 47th James W. McDill (R)James F. Wilson (R)48th 49th 50th 51st 52nd 53rd John H. Gear (R)54th 55th 56th Jonathan P. Dolliver (R)57th 58th 59th 60th Albert B. Cummins (R)61st Lafayette Young (R)62nd William S. Kenyon (R)63rd 64th 65th 66th 67th Charles A. Rawson (R)Smith W. Brookhart (R)68th 69th Daniel F. Steck (D)David W. Stewart (R)70th Smith W. Brookhart (R)71st L. J. Dickinson (R)72nd 73rd Louis Murphy (D)74th Guy Gillette (D)Clyde L. Herring (D)75th 76th 77th George A. Wilson (R)78th 79th Bourke B.Hickenlooper (R) 80th Guy Gillette (D)81st 82nd 83rd Thomas E. Martin (R)84th 85th 86th Jack Miller (R)87th 88th 89th 90th 91st Harold Hughes (D)92nd Dick Clark (D)93rd 94th John Culver (D)95th Roger Jepsen (R)96th 97th Chuck Grassley (R)98th Tom Harkin (D) 99th 100th 101st 102nd 103rd 104th 105th 106th 107th 108th 109th 110th 111th 112th 113th Joni Ernst (R) 114th 115th 116th 117th 118th 119th

United States House of Representatives

1838–1846: 1 non-voting delegate 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 of land.

Starting on September 10, 1838, Iowa Territory sent a non-voting delegate to the House.

Years Delegate from September 10, 1838 – October 27, 1840 William W. Chapman (D) October 28, 1840 – December 28, 1846 Augustus C. Dodge (D)

1846–1863: 2 seats Following statehood on December 28, 1846, Iowa had two seats in the House. It elected both seats statewide at-large on a general ticket, until 1847, when it redistricted into two districts.

Congress Elected on a general ticket 29th Serranus C. Hastings (D) Shepherd Leffler (D) Congress 30th William Thompson (D) Shepherd Leffler (D) 31st Daniel F. Miller (W)32nd Bernhart Henn (D) Lincoln Clark (D)33rd John Parsons Cook (W)34th Augustus Hall (D) James Thorington (W)35th Samuel Ryan Curtis (R) Timothy Davis (R)36th William Vandever (R) 37th James F. Wilson (R)

1863–1873: 6 seats Following the 1860 census, Iowa was apportioned 6 seats.

Congress 38th James F.Wilson (R) Hiram Price (R) William B. Allison (R) Josiah B.Grinnell (R) John A. Kasson (R) Asahel W.Hubbard (R)39th 40th WilliamLoughridge (R) Grenville M. Dodge (R) 41st George W.McCrary (R) William Smyth (R) Francis W. Palmer (R) Charles Pomeroy (R) William P. Wolf (R)42nd Aylett R. Cotton (R) William G. Donnan (R) Madison M. Walden (R) Jackson Orr (R)

1873–1883: 9 seats Following the 1870 census, Iowa was apportioned 9 seats.

Congress 43rd George W.McCrary (R) Aylett R. Cotton (R) William G. Donnan (R) Henry OtisPratt (R) James Wilson (R) William Loughridge (R) John A. Kasson (R) James W.McDill (R) Jackson Orr (R)44th John Q. Tufts (R) L. L. Ainsworth (D) Ezekiel S.Sampson (R) S. AddisonOliver (R)45th Joseph ChamplinStone (R) Hiram Price (R) Theodore WeldBurdick (R) Nathaniel CobbDeering (R) Rush Clark (R) Henry J. B.Cummings (R) William FletcherSapp (R) 46th Moses A.McCoid (R) ThomasUpdegraff (R) James B. Weaver (GB) Edward H. Gillette (GB) Cyrus C.Carpenter (R) William GeorgeThompson (R) 47th Sewall S. Farwell (R) Marsena E. Cutts (R) John A. Kasson (R) William P.Hepburn (R) John C. Cook (D)

1883–1933: 11 seats Following the 1880 census, Iowa was apportioned 11 seats.

Congress District 48th Moses A.McCoid (R) JeremiahH.Murphy (D) David B.Henderson(R) Luman HamlinWeller (GB) Jim Wilson (R) Marsena E.Cutts (R) John A.Kasson (R) William P.Hepburn (R) William H. M.Pusey (D) Adoniram J.Holmes (R) Isaac S.Struble (R) Benjamin T.Frederick (D) John Cook (D) Hiram Smith (R)49th Ben Hall (D) William E.Fuller (R) James B.Weaver (GB) Edwin H.Conger (R) JosephLyman (R)50th John H.Gear (R) Walter I.Hayes (D) Daniel Kerr (R) Albert R.Anderson (IR) 51st Joseph HenrySweney (R) John F.Lacey (R) James P.Flick (R) Joseph ReaReed (R) Jonathan P.Dolliver (R) Edward Hays (R)52nd John J.Seerley (D) Walter H.Butler (D) John TaylorHamilton (D) Frederick E.White (D) John A. T.Hull (R) ThomasBowman (D) George D.Perkins (R)53rd John Gear (R) ThomasUpdegraff (R) Robert G.Cousins (R) John F.Lacey (R) William P.Hepburn (R) Alva L.Hager (R)54th Samuel M.Clark (R) George M.Curtis (R)55th 56th ThomasHedge (R) Joe Lane (R) Gilbert N.Haugen (R) SmithMcPherson (R) LotThomas (R) Walter I.Smith (R) James P.Conner (R)57th John Rumple (R)58th Martin Wade (D) Benjamin P.Birdsall (R)59th Albert F.Dawson (R) Elbert H.Hubbard (R)60th Charles A.Kennedy (R) Daniel W.Hamilton (D)61st Charles E.Pickett (R) James W.Good (R) Nathan E.Kendall (R) William DariusJamieson (D) Frank P.Woods (R) 62nd Irvin S.Pepper (D) Solomon F.Prouty (R) Horace M.Towner (R) William R.Green (R) George C.Scott (R) 63rd MauriceConnolly (D) SanfordKirkpatrick (D) Henry Vollmer (D)64th Harry E.Hull (R) Burton E.Sweet (R) C. WilliamRamseyer (R) Cassius C.Dowell (R) Thomas J.Steele (D)65th George C.Scott (R)66th L. J.Dickinson (R) William D.Boies (R) 67th William F.Kopp (R) CyrenusCole (R) 68th Thomas J. B.Robinson (R) Hiram Evans (R)69th F. DickinsonLetts (R) LloydThurston (R) 70th Earl Vincent (R)71st Charles E.Swanson (R) Ed H.Campbell (R)72nd Bernhard M.Jacobsen (D) Fred C.Gilchrist (R)

1933–1943: 9 seats Following the 1930 census, Iowa was apportioned 9 seats.

Congress District 73rd Edward C.Eicher (D) Bernhard M.Jacobsen (D) Albert Willford (D) FredBiermann (D) LloydThurston (R) Cassius C. Dowell (R) OthaWearin (D) Fred C.Gilchrist (R) Guy Gillette (D)74th John W.Gwynne (R) Hubert Utterback (D)75th William S.Jacobsen (D) Cassius C. Dowell (R) Vincent F.Harrington (D)76th Thomas E.Martin (R) Henry O.Talle (R) Karl M.LeCompte (R) Ben F.Jensen (R) 77th PaulCunningham (R) Harry Narey (R)

1943–1963: 8 seats Following the 1940 census, Iowa was apportioned 8 seats.

Congress District 78th Thomas E.Martin (R) Henry O.Talle (R) John W.Gwynne (R) Karl M.LeCompte (R) PaulCunningham(R) Fred C.Gilchrist (R) Ben F.Jensen (R) Charles B.Hoeven (R)79th James I.Dolliver (R)80th 81st H. R.Gross (R)82nd 83rd 84th FredSchwengel (R)85th MerwinCoad (D)86th Leonard G.Wolf (D) Steven V.Carter (D) NealSmith (D)87th James E.Bromwell (R) John HenryKyl (R)

1963–1973: 7 seats Following the 1960 census, Iowa was apportioned 7 seats.

Congress District 88th FredSchwengel (R) James E.Bromwell (R) H. R.Gross (R) John HenryKyl (R) NealSmith (D) Charles B.Hoeven (R) Ben F.Jensen (R)89th John R.Schmidhauser (D) JohnCulver (D) BertBandstra (D) Stanley L.Greigg (D) John R.Hansen (D)90th FredSchwengel (R) John HenryKyl (R) WileyMayne (R) William J.Scherle (R)91st 92nd

1973–1993: 6 seats Following the 1970 census, Iowa was apportioned 6 seats.

Congress 93rd EdwardMezvinsky (D) John Culver (D) H. R. Gross (R) NealSmith (D) William Scherle (R) Wiley Mayne (R)94th Mike Blouin (D) ChuckGrassley (R) Tom Harkin (D) BerkleyBedell (D)95th Jim Leach (R)96th Tom Tauke (R)97th T. CooperEvans (R)98th 99th Jim RossLightfoot (R)100th DaveNagle (D) Fred Grandy (R)101st 102nd Jim Nussle (R)

1993–2013: 5 seats Following the 1990 census, Iowa was apportioned 5 seats.

Congress 103rd Jim Leach (R) Jim Nussle (R) Jim RossLightfoot (R) Neal Smith (D) Fred Grandy (R)104th Greg Ganske (R) Tom Latham (R)105th LeonardBoswell (D)106th 107th 108th Jim Nussle (R) Jim Leach (R) Tom Latham (R) Steve King (R)109th 110th Bruce Braley (D) DaveLoebsack (D)111th 112th

2013–present: 4 seats Following the 2010 census, Iowa was apportioned 4 seats.

Congress 113th Bruce Braley (D) DaveLoebsack (D) Tom Latham (R) Steve King (R)114th Rod Blum (R) David Young (R)115th 116th Abby Finkenauer (D) Cindy Axne (D)117th Ashley Hinson (R) MariannetteMiller-Meeks (R) Randy Feenstra (R)118th MariannetteMiller-Meeks (R) Ashley Hinson (R) Zach Nunn (R) (2025–2027)

Key

See also

List of United States congressional districts Iowa's congressional districts Political party strength in Iowa

References