Iowa was admitted to the Union on December 28, 1846. [edit] Class II | Senator | Party | Took office | Left office | Reason | Notes/other offices | | George W. Jones |  | Democratic | December 7, 1848 | March 4, 1859 | Lost renomination | Minister to New Granada (1859–1861) | | James W. Grimes |  | Republican | March 4, 1859 | December 6, 1869 | Resigned | Governor of Iowa (1854–1858) | | James B. Howell |  | Republican | January 18, 1870 | March 4, 1871 | Retired | | | George G. Wright |  | Republican | March 4, 1871 | March 4, 1877 | Retired | | | Samuel J. Kirkwood |  | Republican | March 4, 1877 | March 7, 1881 | Resigned | Secretary of the Interior (1881–1882)
Governor of Iowa (1860–1864; 1876–1877)
Also served in Iowa's class III seat | | James W. McDill |  | Republican | March 8, 1881 | March 4, 1883 | Retired | | | James F. Wilson |  | Republican | March 4, 1883 | March 4, 1895 | Retired | President of the Iowa Senate (1861)
A House impeachment manager for the Senate trial of Andrew Johnson | | John H. Gear |  | Republican | March 4, 1895 | July 14, 1900 | Died | Governor of Iowa (1878–1881)
Speaker of the Iowa House of Representatives (1873–1877) | | Jonathan P. Dolliver |  | Republican | August 22, 1900 | October 15, 1910 | Died | | | Lafayette Young |  | Republican | November 12, 1910 | April 11, 1911 | Lost special election | | | William S. Kenyon |  | Republican | April 12, 1911 | February 24, 1922[1] | Resigned | Judge of the 8th Circuit Court of Appeals (1922–1933) | | Charles A. Rawson |  | Republican | February 24, 1922 | December 1, 1922 | Retired | | | Smith W. Brookhart |  | Republican | November 7, 1922 | April 12, 1926 | Election overturned by Senate | Also served in Iowa's class III seat | | Daniel F. Steck |  | Democratic | April 12, 1926 | March 4, 1931 | Lost re-election | | | Lester J. Dickinson |  | Republican | March 4, 1931 | January 3, 1937 | Lost re-election | | | Clyde L. Herring |  | Democratic | January 15, 1937 | January 3, 1943 | Lost re-election | Governor of Iowa (1933–1937) | | George A. Wilson |  | Republican | January 14, 1943 | January 3, 1949 | Lost re-election | Governor of Iowa (1939–1943) | | Guy Gillette |  | Democratic | January 3, 1949 | January 3, 1955 | Lost re-election | Also served in Iowa's class III seat | | Thomas E. Martin |  | Republican | January 3, 1955 | January 3, 1961 | Retired | | | Jack Miller |  | Republican | January 3, 1961 | January 3, 1973 | Lost re-election | Judge of the United States Court of Customs and Patent Appeals (1973-1982) and the United States Court of Appeals for the Federal Circuit (1982–1994) | | Richard C. Clark |  | Democratic | January 3, 1973 | January 3, 1979 | Lost re-election | | Roger Jepsen |  | Republican | January 3, 1979 | January 3, 1985 | Lost re-election | Lieutenant Governor of Iowa (1968–1972) | | Tom Harkin |  | Democratic | January 3, 1985 | Incumbent | | | [edit] Class III | Senator | Party | Took office | Left office | Reason | Notes/other offices | | Augustus C. Dodge |  | Democratic | December 7, 1848 | February 22, 1855 | Resigned | Minister to Spain (1855–1859) | | James Harlan |  | Free Soil | March 4, 1855[2] | May 15, 1865 | Resigned | Secretary of the Interior (1865–1866) | | Republican | | Samuel J. Kirkwood | | Republican | January 13, 1866 | March 4, 1867 | | Secretary of the Interior (1881–1882)
Governor of Iowa (1860–1864; 1876–1877)
Also served in Iowa's class II seat | | James Harlan | | Republican | March 4, 1867 | March 4, 1873 | | Secretary of the Interior (1865–1866) | | William B. Allison |  | Republican | March 4, 1873 | August 4, 1908 | Died | | | Albert B. Cummins |  | Republican | November 24, 1908 | July 30, 1926 | Died | Governor of Iowa (1902–1908)
President pro tempore (1919–1925) | | David W. Stewart |  | Republican | August 7, 1926 | March 4, 1927 | Retired | | | Smith W. Brookhart | | Republican | March 4, 1927 | March 4, 1933 | Lost renomination and re-election[3] | Also served in Iowa's class II seat | | Richard L. Murphy |  | Democratic | March 4, 1933 | July 16, 1936 | Died | | | Guy Gillette | | Democratic | November 3, 1936 | January 3, 1945 | Lost re-election | Also served in Iowa's class II seat | | Bourke B. Hickenlooper |  | Republican | January 3, 1945 | January 3, 1969 | Retired | Lieutenant Governor of Iowa (1939–1942)
Governor of Iowa (1943–1944) | | Harold Hughes |  | Democratic | January 3, 1969 | January 3, 1975 | Retired | Governor of Iowa (1963–1968) | | John Culver |  | Democratic | January 3, 1975 | January 3, 1981 | Lost re-election | | | Chuck Grassley |  | Republican | January 3, 1981 | Incumbent | | | - ^ Kenyon was nominated by President Harding for the federal bench and immediately confirmed by his Senate colleagues on January 31, 1922, but he delayed his resignation from the Senate for over two weeks, mailing it on February 15 and stating that it was effective February 24. "Kenyon resignation on the way," Iowa City Press-Citizen, 1922-02-16, at p.1.
- ^ On January 5, 1957, the Senate determined that Harlan's election was not valid, as the Iowa Senate had not participated in it. Harlan was subsequently regularly elected and retook his seat on January 29, 1857.
- ^ Brookhart ran as an independent after losing in the Republican primary in 1932; he also lost the general election.
[edit] See also
| United States Senators from Iowa | | | Class 2 | |  | | | Class 3 | | | |
