CONGRESS | NAME OF SENATOR | TERM BEGAN | TERM ENDED | COMMENTS |
---|---|---|---|---|
Class 2 | ||||
30th - 35th | George W. Jones (D) | Dec. 7, 1848 | Mar. 3, 1859 | |
36th - 41st | James W. Grimes (R) | Mar. 4, 1859 | Dec. 6, 1869 | Resigned |
41st | James B. Howell (R) | Jan. 18, 1870 | Mar. 3, 1871 | |
42nd - 44th | George G. Wright (R) | Mar. 4, 1871 | Mar. 3, 1877 | |
45th - 46th | Samuel J. Kirkwood (R) | Mar. 4, 1877 | Mar. 7, 1881 | Resigned |
47th | James W. McDill (R) | Mar. 8, 1881 | Mar. 3, 1883 | Appointed, then elected |
48th - 53rd | James F. Wilson (R) | Mar. 4, 1883 | Mar. 3, 1895 | |
54th - 56th | John H. Gear (R) | Mar. 4, 1895 | Jul. 14, 1900 | Died |
56th - 61st | Jonathan P. Dolliver (R) | Aug. 22, 1900 | Oct. 15, 1910 | Appointed, then elected; died |
61st - 62nd | Lafayette Young (R) | Nov. 12, 1910 | Apr. 11, 1911 | Appointed |
62nd - 67th | William S. Kenyon (R) | Apr. 12, 1911 | Feb. 24, 1922 | Resigned |
67th | Charles A. Rawson (R) | Feb. 24, 1922 | Nov. 7, 1922 | Appointed |
67th - 69th | Smith W. Brookhart (R) | Nov. 8, 1922 | Apr. 12, 19261 | |
69th - 71st | Daniel F. Steck (D) | Apr. 12, 19262 | Mar. 3, 1931 | |
72nd - 74th | Lester J. Dickinson (R) | Mar. 4, 1931 | Jan. 3, 1937 | |
75th - 77th | Clyde L. Herring (D) | Jan. 15, 19373 | Jan. 3, 1943 | |
78th - 80th | George A. Wilson (R) | Jan. 14, 19434 | Jan. 3, 1949 | |
81st - 83rd | Guy M. Gillette (D) | Jan. 3, 1949 | Jan. 3, 1955 | |
84th - 86th | Thomas E. Martin (R) | Jan. 3, 1955 | Jan. 3, 1961 | |
87th - 92nd | Jack R. Miller (R) | Jan. 3, 1961 | Jan. 3, 1973 | |
93rd - 95th | Richard C. Clark (D) | Jan. 3, 1973 | Jan. 3, 1979 | |
96th - 98th | Roger W. Jepsen (R) | Jan. 3, 1979 | Jan. 3, 1985 | |
99th - 113th | Thomas R. Harkin (D) | Jan. 3, 1985 | Jan. 3, 2015 | |
114th - | Joni Ernst (R) | Jan. 3, 2015 | Present | |
Class 3 | ||||
30th - 33rd | Augustus C. Dodge (D) | Dec. 7, 1848 | Feb. 22, 1855 | Resigned |
34th - 39th | James Harlan5 (OP, R) | Mar. 4, 1855 | May 15, 1865 | Resigned |
39th | Samuel J. Kirkwood (R) | Jan. 13, 1866 | Mar. 3, 1867 | |
40th - 42nd | James Harlan (R) | Mar. 4, 1867 | Mar. 3, 1873 | |
43rd - 60th | William B. Allison (R) | Mar. 4, 1873 | Aug. 4, 1908 | Died |
60th - 69th | Albert B. Cummins (R) | Nov. 24, 1908 | Jul. 30, 1926 | Died |
69th | David W. Stewart (R) | Aug. 7, 1926 | Mar. 3, 1927 | Appointed, then elected |
70th - 72nd | Smith W. Brookhart (R) | Mar. 4, 1927 | Mar. 3, 1933 | |
73rd - 74th | Richard L. Murphy (D) | Mar. 4, 1933 | Jul. 16, 1936 | Died |
74th - 78th | Guy M. Gillette (D) | Nov. 4, 1936 | Jan. 3, 1945 | |
79th - 90th | Bourke B. Hickenlooper (R) | Jan. 3, 1945 | Jan. 3, 1969 | |
91st - 93rd | Harold E. Hughes (D) | Jan. 3, 1969 | Jan. 3, 1975 | |
94th - 96th | John C. Culver (D) | Jan. 3, 1975 | Jan. 3, 1981 | |
97th - | Charles E. Grassley (R) | Jan. 3, 1981 | Present |
1. Unseated by the Senate due to a contested election.
2. Seated after successfully contesting the election of the incumbent Senator Smith Brookhart.
3. Elected to term beginning Jan. 3, 1937 but not seated until Jan. 15. Served as Iowa governor during interim.
4. Elected to term beginning Jan. 3, 1949 but not seated until Jan. 14. Served as Iowa governor during interim.
5. Seated Dec. 31, 1855. Owing to irregularities in the legislative proceedings, the Senate declared the seat vacant in January 1857; reelected to fill that vacancy and returned to his seat on January 29, 1857.