89th United States Congress
Senate
Columns: State (class) | Vacator | Reason for change | Successor | Date of successors formal installation
South Carolina (3) | Olin D. Johnston (D) | Died April 18, 1965 | Donald S. Russell (D) | April 22, 1965 | South Carolina (3) | Donald S. Russell (D) | Successor elected November 8, 1965 | Ernest Hollings (D) | November 9, 1965 | Virginia (1) | Harry F. Byrd (D) | Resigned November 10, 1965 | Harry F. Byrd, Jr. (D) | November 12, 1965 | Michigan (2) | Patrick V. McNamara (D) | Died April 30, 1966 | Robert P. Griffin (R) | May 11, 1966 | Virginia (2) | A. Willis Robertson (D) | Resigned December 30, 1966 | William B. Spong, Jr. (D) | December 31, 1966