3, 1867 | nowrap | James R. McCormick (D) | December 17, 1867 |- | | nowrap | Cornelius S. Hamilton (R) | Killed by insane son December 22, 1867 | nowrap | John Beatty (R) | February 5, 1868 |- | | nowrap | George W. Morgan (D) | Lost contested election June 3, 1868 | nowrap | Columbus Delano (R) | June 3, 1868 |- | | nowrap | Joseph W. McClurg (R) | Resigned in July 1868 | nowrap | John H. Stover (R) | December 7, 1868 |- | | nowrap | Thaddeus Stevens (R) | Died August 11, 1868 | nowrap | Oliver J. Dickey (R) | December 7, 1868 |- | | nowrap | Darwin A. Finney (R) | Died August 25, 1868 | nowrap | S. Newton Pettis (R) | December 7, 1868 |- | | nowrap | James Mann (D) | Died August 26, 1868 | Vacant | Not filled this term |- | | nowrap | James M. Hinds (R) | Assassinated October 22, 1868 | nowrap | James T. Elliott (R) | January 13, 1869 |- | | nowwap | Charles P. Clever (D) | Lost contested election February 20, 1869 | nowrap | J. Francisco Chaves (R) | February 20, 1869 |} Committees Senate Agriculture (Chairman: Simon Cameron; Ranking Member: Thomas W. Tipton) Appropriations (Chairman: Lot M. Morrill; Ranking Member: Cornelius Cole) Audit and Control the Contingent Expenses of the Senate (Chairman: Aaron H. Cragin; Ranking Member: Charles R. Buckalew) Claims (Chairman: Timothy O. Howe; Ranking Member: Justin S. Morrill) Commerce (Chairman: Zachariah Chandler; Ranking Member: Henry W. Corbett) Distributing Public Revenue Among the States (Select) District of Columbia (Chairman: James Harlan; Ranking Member: James W. Patterson) Education Engrossed Bills (Chairman: Joseph S. Fowler; Ranking Member: Daniel S. Norton) Finance (Chairman: John Sherman; Ranking Member: Alexander G. Cattell) Foreign Relations (Chairman: Charles Sumner; Ranking Member: Oliver P. Morton) Impeachment of President Andrew Johnson (Select) Impeachment Trial Investigation (Select) Indian Affairs (Chairman: John B. Henderson; Ranking Member: John M. Thayer) Judiciary (Chairman: Lyman Trumbull; Ranking Member: Roscoe Conkling) Manufactures (Chairman: William Sprague IV; Ranking Member: Cornelius Cole) Military Affairs and the Militia (Chairman: Henry Wilson; Ranking Member: Oliver P. Morton) Mines and Mining (Chairman: John Conness; Ranking Member: Richard Yates) Naval Affairs (Chairman: James W. Grimes; Ranking Member: Frederick T. Frelinghuysen) Ninth Census (Select) Ordnance and War Ships (Select) (Chairman: