States in the Senate | Connecticut Senators
| CONGRESS | NAME OF SENATOR | TERM BEGAN | TERM ENDED | COMMENTS |
|---|---|---|---|---|
| Class 1 | ||||
| 1st - 4th | Oliver Ellsworth (PRO-ADMIN, F) | Mar. 4, 1789 | Mar. 8, 1796 | Resigned |
| 4th - 11th | James Hillhouse (F) | May 18, 1796 | Jun. 10, 1810 | Resigned |
| 11th - 16th | Samuel W. Dana (F) | Dec. 4, 1810 | Mar. 3, 1821 | |
| 17th - 18th | Elijah Boardman (R) | Mar. 4, 1821 | Aug. 18, 1823 | Died |
| 18th - 19th | Henry W. Edwards (JR) | Oct. 8, 1823 | Mar. 3, 1827 | Appointed, then elected |
| 20th - 22nd | Samuel A. Foot (ADAMS, AJ) | Mar. 4, 1827 | Mar. 3, 1833 | |
| 23rd - 24th | Nathan Smith (AJ) | Mar. 4, 1833 | Dec. 6, 1835 | Died |
| 24th - 25th | John M. Niles (J) | Dec. 14, 1835 | Mar. 3, 1839 | Appointed, then elected |
| 26th | Thaddeus Betts (W) | Mar. 4, 1839 | Apr. 7, 1840 | Died |
| 26th - 30th | Jabez W. Huntington (W) | May 4, 1840 | Nov. 2, 1847 | Died |
| 30th - 31st | Roger S. Baldwin (W) | Nov. 11, 1847 | Mar. 3, 1851 | Appointed, then elected |
| 32nd - 34th | Issac Toucey (D) | May 12, 18521 | Mar. 3, 1857 | |
| 35th - 40th | James Dixon (R) | Mar. 4, 1857 | Mar. 3, 1869 | |
| 41st - 43rd | William A. Buckingham (R) | Mar. 4, 1869 | Feb. 5, 1875 | Died |
| 43rd - 46th | William W. Eaton (D) | Feb. 5, 1875 | Mar. 3, 1881 | Appointed, then elected |
| 47th - 58th | Joseph R. Hawley (R) | Mar. 4, 1881 | Mar. 3, 1905 | |
| 59th - 61st | Morgan G. Bulkely (R) | Mar. 4, 1905 | Mar. 3, 1911 | |
| 62nd - 70th | George P. McLean (R) | Mar. 4, 1911 | Mar. 3, 1929 | |
| 71st - 73rd | Frederic C. Walcott (R) | Mar. 4, 1929 | Jan. 3, 1935 | |
| 74th - 79th | Francis T. Maloney (D) | Jan. 3, 1935 | Jan. 16, 1945 | Died |
| 79th | Thomas C. Hart (R) | Feb. 15, 1945 | Nov. 5, 1946 | Appointed |
| 80th - 81st | Raymond E. Baldwin (R) | Dec. 27, 1946 | Dec. 16, 1949 | Resigned |
| 81st - 82nd | William Benton (D) | Dec. 17, 1949 | Jan. 3, 1953 | Appointed, then elected |
| 83rd - 85th | William A. Purtell (R) | Jan. 3, 1953 | Jan. 3, 1959 | |
| 86th - 91st | Thomas J. Dodd (D) | Jan. 3, 1959 | Jan. 3, 1971 | |
| 92nd - 100th | Lowell P. Weicker Jr. (R) | Jan. 3, 1971 | Jan. 3, 1989 | |
| 101st - 112th | Joseph I. Lieberman (D, ID) | Jan. 3, 1989 | Jan. 3, 2013 | |
| 113th - | Christopher Murphy (D) | Jan. 3, 2013 | Present | |
| Class 3 | ||||
| 1st - 2nd | William S. Johnson (PRO-ADMIN) | Mar. 4, 1789 | Mar. 4, 1791 | Resigned |
| 2nd - 3rd | Roger Sherman (PRO-ADMIN) | Jun. 13, 1791 | Jul. 23, 1793 | Died |
| 3rd | Stephen M. Mitchell (PRO-ADMIN) | Dec. 2, 1793 | Mar. 3, 1795 | |
| 4th | Jonathan Trumbull Jr. (F) | Mar. 4, 1795 | Jun. 10, 1796 | Resigned |
| 4th - 10th | Uriah Tracy (F) | Oct. 13, 1796 | Jul. 19, 1807 | Died |
| 10th - 13th | Chauncey Goodrich (F) | Oct. 25, 1807 | May 1813 | Resigned |
| 13th - 15th | David Daggett (F) | May 13, 1813 | Mar. 3, 1819 | |
| 16th - 18th | James Lanman (R, CRR) | Mar. 4, 1819 | Mar. 3, 1825 | |
| 19th - 21st | Calvin Willey (ADAMS, AJ) | May 4, 1825 | Mar. 3, 1831 | |
| 22nd - 24th | Gideon Tomlinson (AJ) | Mar. 4, 1831 | Mar. 3, 1837 | |
| 25th - 27th | Perry Smith (D) | Mar. 4, 1837 | Mar. 3, 1843 | |
| 28th - 30th | John M. Niles (D) | Mar. 4, 1843 | Mar. 3, 1849 | |
| 31st - 33rd | Truman Smith (W) | Mar. 4, 1849 | May 24, 1854 | Resigned |
| 33rd | Francis Gillette (FS) | May 25, 1854 | Mar. 3, 1855 | |
| 34th - 39th | Lafayette S. Foster (OP, R) | Mar. 4, 1855 | Mar. 3, 1867 | |
| 40th - 44th | Orris S. Ferry (R, LR, R) | Mar. 4, 1867 | Nov. 21, 1875 | Died |
| 44th | James E. English (D) | Nov. 27, 1875 | May 17, 1876 | Appointed |
| 44th - 45th | William H. Barnum (D) | May 17, 1876 | Mar. 3, 1879 | |
| 46th - 59th | Orville H. Platt (R) | Mar. 4, 1879 | Apr. 21, 1905 | Died |
| 59th - 68th | Frank B. Brandegee (R) | May 10, 1905 | Oct. 14, 1924 | Died |
| 68th - 72nd | Hiram Bingham (R) | Jan. 8, 1925 | Mar. 3, 1933 | |
| 73rd - 75th | Augustine Lonergan (D) | Mar. 4, 1933 | Jan. 3, 1939 | |
| 76th - 78th | John A. Danaher (R) | Jan. 3, 1939 | Jan. 3, 1945 | |
| 79th - 84th | Brien McMahon (D) | Jan. 3, 1945 | Jul. 28, 1952 | Died |
| 82nd | William A. Purtell (R) | Aug. 29, 1952 | Nov. 4, 1952 | Appointed |
| 82nd - 87th | Prescott S. Bush (R) | Nov. 5, 1952 | Jan. 3, 1963 | |
| 88th - 96th | Abraham A. Ribicoff (D) | Jan. 3, 1963 | Jan. 3, 1981 | |
| 97th - 111th | Christopher J. Dodd (D) | Jan. 3, 1981 | Jan. 3, 2011 | |
| 112th - | Richard Blumenthal (D) | Jan. 3, 2011 | Present | |
1. Vacancy from March 4, 1851, to May 11, 1852, because of failure of legislature to elect.