Staggers (D) . John M. Slack Jr. (D) . Ken Hechler (D) . James Kee (D) Wisconsin . Lynn E. Stalbaum (D) . Robert Kastenmeier (D) . Vernon Wallace Thomson (R) . Clement J. Zablocki (D) . Henry S. Reuss (D) . John Abner Race (D) . Melvin Laird (R) . John W. Byrnes (R) . Glenn Robert Davis (R) . Alvin O'Konski (R) Wyoming . Teno Roncalio (D) Non-voting member . Santiago Polanco-Abreu (Resident Commissioner) (PPD) Changes in membership Senate Replacements: 5 Democratic: 1-seat net loss Republican: 1-seat net gain Deaths: 2 Resignations: 2 |- | South Carolina(3) | | Olin D. Johnston (D) | Died April 18, 1965.Successor appointed April 22, 1965 to continue the term. | | Donald S. Russell (D) | April 22, 1965 |- | Virginia(1) | | Harry F. Byrd (D) | Resigned November 10, 1965.Successor appointed November 12, 1965 to continue his father's term. | | Harry F. Byrd Jr. (D) | November 12, 1965 |- | Michigan(2) | | Patrick V. McNamara (D) | Died April 30, 1966.Successor appointed May 11, 1966 to finish the term. | | Robert P. Griffin (R) | May 11, 1966 |- | South Carolina(3) | | Donald S. Russell (D) | Interim appointee lost nomination to finish the term.Successor elected November 8, 1966. | | Fritz Hollings (D) | November 9, 1966 |- | Virginia(2) | | Absalom Willis Robertson (D) | Resigned December 30, 1966, having lost renomination.Successor appointed to finish the term, having already been elected to the next term. | | William B. Spong Jr. (D) | December 31, 1966 |- | Tennessee(2) | | Ross Bass (D) | Resigned January 2, 1967, having lost renomination.Seat remained vacant until the end of the term (the next day). | Vacant | Not filled this term |} House of Representatives Replacements: 9 Democratic: no net change Republican: no net change Deaths: 5 Resignations: 15 Total seats with changes: 20 |- | | nowrap| Albert Watson (D) | style="font-size:80%" | Resigned February 1, 1965, after being stripped of seniority by the House Democratic Caucus for supporting Republican Presidential candidate Barry Goldwater. Was re-elected as a Republican in a special election to replace himself. | nowrap | Albert Watson (R) | June 15, 1965 |- | | nowrap| T. Ashton Thompson (D) | style="font-size:80%" | Died July 1, 1965 | nowrap | Edwin Edwards (D) | October