Iowa was admitted to the Union on December 28, 1846, and elects United States senators to class 2 and class 3. The state's current U.S. senators are Republicans Chuck Grassley (serving since 1981) and Joni Ernst (serving since 2015). Chuck Grassley is Iowa's longest-serving senator (since 1981).
Current delegation
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Chuck Grassley (R)
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Joni Ernst (R)
List of senators
Class 2 Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2002, 2008, 2014, and 2020. The next election will be in 2026. | C | Class 3 Class 3 U.S. senators belong to the electoral cycle that has recently been contested in 2004, 2010, 2016, and 2022. The next election will be in 2028. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
| Vacant | Dec 28, 1846 – Dec 7, 1848 | Legislature failed to elect.[1] | — | 29th | — | Legislature failed to elect.[1] | Dec 28, 1846 – Dec 7, 1848 | Vacant | ||||
| 30th | ||||||||||||
| 1 |  George W. Jones | Democratic | Dec 7, 1848 – Mar 3, 1859 | Elected in 1848. | 1 | 1 | Elected in 1848. | Dec 7, 1848 – Feb 22, 1855 | Democratic |  Augustus C. Dodge | 1 | |
| 31st | 2 | Re-elected in 1849.Resigned to become U.S. Minister to Spain, having lost re-election. | ||||||||||
| 32nd | ||||||||||||
| Re-elected in 1852.Lost renomination. | 2 | 33rd | ||||||||||
| Feb 22, 1855 – Mar 3, 1855 | Vacant | |||||||||||
| 34th | 3 | Elected in 1855.Elected invalidated, as the Iowa Senate had not participated in it. | Mar 4, 1855 – Jan 5, 1857 | Free Soil |  James Harlan | 2 | ||||||
| Jan 5, 1857 – Jan 29, 1857 | Vacant | |||||||||||
| Re-elected to finish his vacant term. | Jan 29, 1857 – May 15, 1865 | Republican | James Harlan | |||||||||
| 35th | ||||||||||||
| 2 |  James W. Grimes | Republican | Mar 4, 1859 – Dec 6, 1869 | Elected in 1858. | 3 | 36th | ||||||
| 37th | 4 | Re-elected in 1860.Resigned to become U.S. Secretary of the Interior. | ||||||||||
| 38th | ||||||||||||
| Re-elected in 1864.Resigned due to ill health. | 4 | 39th | ||||||||||
| May 15, 1865 – Jan 13, 1866 | Vacant | |||||||||||
| Elected to finish Harlan's term.[2]Lost nomination for the next term. | Jan 13, 1866 – Mar 3, 1867 | Republican |  Samuel J. Kirkwood | 3 | ||||||||
| 40th | 5 | Elected in 1866.[3]Lost re-election. | Mar 4, 1867 – Mar 3, 1873 | Republican | James Harlan | 4 | ||||||
| 41st | ||||||||||||
| Vacant | Dec 6, 1869 – Jan 18, 1870 | |||||||||||
| 3 |  James B. Howell | Republican | Jan 18, 1870 – Mar 3, 1871 | Elected to finish Grimes's term.Retired. | ||||||||
| 4 |  George G. Wright | Republican | Mar 4, 1871 – Mar 3, 1877 | Elected in 1870.Retired. | 5 | 42nd | ||||||
| 43rd | 6 | Elected in 1872.[4] | Mar 4, 1873 – Aug 4, 1908 | Republican |  William B. Allison | 5 | ||||||
| 44th | ||||||||||||
| 5 | Samuel J. Kirkwood | Republican | Mar 4, 1877 – Mar 7, 1881 | Elected in 1876 or 1877.Resigned to become U.S. Secretary of the Interior. | 6 | 45th | ||||||
| 46th | 7 | Re-elected in 1878.[5] | ||||||||||
| 47th | ||||||||||||
| 6 |  James W. McDill | Republican | Mar 8, 1881 – Mar 3, 1883 | Appointed to continue Kirkwood's term.Elected in 1882 to finish Kirkwood's term.[6]Retired. | ||||||||
| 7 |  James F. Wilson | Republican | Mar 4, 1883 – Mar 3, 1895 | Elected in 1882.[7] | 7 | 48th | ||||||
| 49th | 8 | Re-elected in 1884.[8] | ||||||||||
| 50th | ||||||||||||
| Re-elected in 1888.Retired. | 8 | 51st | ||||||||||
| 52nd | 9 | Re-elected in 1890.[9] | ||||||||||
| 53rd | ||||||||||||
| 8 |  John H. Gear | Republican | Mar 4, 1895 – Jul 14, 1900 | Elected in 1894.[10]Re-elected in 1900,[11] but died. | 9 | 54th | ||||||
| 55th | 10 | Re-elected in 1896.[12] | ||||||||||
| 56th | ||||||||||||
| Vacant | Jul 14, 1900 – Aug 22, 1900 | |||||||||||
| 9 |  Jonathan P. Dolliver | Republican | Aug 22, 1900 – Oct 15, 1910 | Appointed to finish Gear's term. | ||||||||
| Appointed to begin the vacant term.Elected in 1902 to finish the vacant term.[13] | 10 | 57th | ||||||||||
| 58th | 11 | Re-elected in 1902.[14]Renominated in 1908 but died before the general election. | ||||||||||
| 59th | ||||||||||||
| Re-elected in 1907.Died. | 11 | 60th | ||||||||||
| Aug 4, 1908 – Nov 24, 1908 | Vacant | |||||||||||
| Elected to finish Allison's term. | Nov 24, 1908 – Jul 30, 1926 | Republican |  Albert B. Cummins | 6 | ||||||||
| 61st | 12 | Re-elected in 1909. | ||||||||||
| Vacant | Oct 15, 1910 – Nov 12, 1910 | |||||||||||
| 10 |  Lafayette Young | Republican | Nov 12, 1910 – Apr 11, 1911 | Appointed to continue Dolliver's term.Lost election to finish Dolliver's term. | ||||||||
| 62nd | ||||||||||||
| 11 |  William S. Kenyon | Republican | Apr 12, 1911 – Feb 24, 1922 | Elected to finish Dolliver's term. | ||||||||
| Re-elected in 1913. | 12 | 63rd | ||||||||||
| 64th | 13 | Re-elected in 1914. | ||||||||||
| 65th | ||||||||||||
| Re-elected in 1918.Resigned to become Judge of the U.S. Court of Appeals. | 13 | 66th | ||||||||||
| 67th | 14 | Re-elected in 1920.Lost renomination, then died. | ||||||||||
| 12 |  Charles A. Rawson | Republican | Feb 24, 1922 – Dec 1, 1922 | Appointed to continue Kenyon's term.Retired when his successor was elected. | ||||||||
| 13 |  Smith W. Brookhart | Republican | Dec 1, 1922 – Apr 12, 1926 | Elected to finish Kenyon's term. | ||||||||
| 68th | ||||||||||||
| Re-elected in 1924.Lost election challenge. | 14 | 69th | ||||||||||
| 14 |  Daniel F. Steck | Democratic | Apr 12, 1926 – Mar 3, 1931 | Successfully challenged his predecessor's election.Lost re-election. | ||||||||
| Jul 30, 1926 – Aug 7, 1926 | Vacant | |||||||||||
| Appointed to continue Cummins's term.Elected in 1926 to finish Cummins's term.[15]Retired. | Aug 7, 1926 – Mar 3, 1927 | Republican |  David W. Stewart | 7 | ||||||||
| 70th | 15 | Elected in 1926.Lost renomination and then lost re-election as an Independent. | Mar 4, 1927 – Mar 3, 1933 | Republican | Smith W. Brookhart | 8 | ||||||
| 71st | ||||||||||||
| 15 |  L. J. Dickinson | Republican | Mar 4, 1931 – Jan 3, 1937 | Elected in 1930.Lost re-election. | 15 | 72nd | ||||||
| 73rd | 16 | Elected in 1932.Died. | Mar 4, 1933 – Jul 16, 1936 | Democratic |  Louis Murphy | 9 | ||||||
| 74th | ||||||||||||
| Jul 16, 1936 – Nov 3, 1936 | Vacant | |||||||||||
| Elected to finish Murphy's term. | Nov 3, 1936 – Jan 3, 1945 | Democratic |  Guy Gillette | 10 | ||||||||
| 16 |  Clyde L. Herring | Democratic | Jan 3, 1937 – Jan 3, 1943 | Elected in 1936. Didn't take seat until Jan 15, 1937 in order to remain Governor of Iowa.Lost re-election. | 16 | 75th | ||||||
| 76th | 17 | Re-elected in 1938.Lost re-election. | ||||||||||
| 77th | ||||||||||||
| 17 |  George A. Wilson | Republican | Jan 3, 1943 – Jan 3, 1949 | Elected in 1942. Didn't take seat until Jan 14, 1943 in order to remain Governor of Iowa.Lost re-election. | 17 | 78th | ||||||
| 79th | 18 | Elected in 1944. | Jan 3, 1945 – Jan 3, 1969 | Republican |  Bourke B. Hickenlooper | 11 | ||||||
| 80th | ||||||||||||
| 18 | Guy Gillette | Democratic | Jan 3, 1949 – Jan 3, 1955 | Elected in 1948.Lost re-election. | 18 | 81st | ||||||
| 82nd | 19 | Re-elected in 1950. | ||||||||||
| 83rd | ||||||||||||
| 19 |  Thomas E. Martin | Republican | Jan 3, 1955 – Jan 3, 1961 | Elected in 1954.Retired. | 19 | 84th | ||||||
| 85th | 20 | Re-elected in 1956. | ||||||||||
| 86th | ||||||||||||
| 20 |  Jack Miller | Republican | Jan 3, 1961 – Jan 3, 1973 | Elected in 1960. | 20 | 87th | ||||||
| 88th | 21 | Re-elected in 1962Retired. | ||||||||||
| 89th | ||||||||||||
| Re-elected in 1966.Lost re-election. | 21 | 90th | ||||||||||
| 91st | 22 | Elected in 1968.Retired. | Jan 3, 1969 – Jan 3, 1975 | Democratic |  Harold Hughes | 12 | ||||||
| 92nd | ||||||||||||
| 21 |  Dick Clark | Democratic | Jan 3, 1973 – Jan 3, 1979 | Elected in 1972.Lost re-election. | 22 | 93rd | ||||||
| 94th | 23 | Elected in 1974.Lost re-election. | Jan 3, 1975 – Jan 3, 1981 | Democratic |  John Culver | 13 | ||||||
| 95th | ||||||||||||
| 22 |  Roger Jepsen | Republican | Jan 3, 1979 – Jan 3, 1985 | Elected in 1978.Lost re-election. | 23 | 96th | ||||||
| 97th | 24 | Elected in 1980. | Jan 3, 1981 – present | Republican |  Chuck Grassley | 14 | ||||||
| 98th | ||||||||||||
| 23 |  Tom Harkin | Democratic | Jan 3, 1985 – Jan 3, 2015 | Elected in 1984. | 24 | 99th | ||||||
| 100th | 25 | Re-elected in 1986. | ||||||||||
| 101st | ||||||||||||
| Re-elected in 1990. | 25 | 102nd | ||||||||||
| 103rd | 26 | Re-elected in 1992. | ||||||||||
| 104th | ||||||||||||
| Re-elected in 1996. | 26 | 105th | ||||||||||
| 106th | 27 | Re-elected in 1998. | ||||||||||
| 107th | ||||||||||||
| Re-elected in 2002. | 27 | 108th | ||||||||||
| 109th | 28 | Re-elected in 2004. | ||||||||||
| 110th | ||||||||||||
| Re-elected in 2008Retired. | 28 | 111th | ||||||||||
| 112th | 29 | Re-elected in 2010. | ||||||||||
| 113th | ||||||||||||
| 24 |  Joni Ernst | Republican | Jan 3, 2015 – present | Elected in 2014. | 29 | 114th | ||||||
| 115th | 30 | Re-elected in 2016. | ||||||||||
| 116th | ||||||||||||
| Re-elected in 2020. | 30 | 117th | ||||||||||
| 118th | 31 | Re-elected in 2022. | ||||||||||
| 119th | ||||||||||||
| To be determined in the 2026 election. | 31 | 120th | ||||||||||
| 121st | 32 | To be determined in the 2028 election. | ||||||||||
| # | Senator | Party | Years in office | Electoral history | T | C | T | Electoral history | Years in office | Party | Senator | # |
| Class 2 | Class 3 | |||||||||||
See also
Notes
References
- Byrd, Robert C. (October 1, 1993). Wolff, Wendy (ed.). The Senate, 1789-1989: Historical Statistics, 1789-1992. United States Senate Historical Office (volume 4 Bicentennial ed.). Washington, D.C.: U.S. Government Printing Office. ISBN 9780160632563.
- Clark, Dan Elbert (1913). "History of Senatorial Elections in Iowa". Iowa City, Iowa.
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