February 1, 1970 | nowrap | John H. Rousselot (R) | June 30, 1970 |- | | nowrap| James B. Utt (R) | style="font-size:80%" | Died March 1, 1970 | nowrap | John G. Schmitz (R) | June 30, 1970 |- | | nowrap| William St. Onge (D) | style="font-size:80%" | Died May 1, 1970 | nowrap | Robert H. Steele (R) | November 3, 1970 |- | | nowrap| Michael J. Kirwan (D) | style="font-size:80%" | Died July 27, 1970 | nowrap | Charles J. Carney (D) | November 3, 1970 |- | | nowrap| George Watkins (R) | style="font-size:80%" | Died August 7, 1970 | nowrap | John H. Ware III (R) | November 3, 1970 |- | | nowrap| William L. Dawson (D) | style="font-size:80%" | Died November 9, 1970 | rowspan=4 |Vacant | rowspan=4 |Not filled this term |- | | nowrap| L. Mendel Rivers (D) | style="font-size:80%" | Died December 28, 1970 |- | | nowrap| William Roth (R) | style="font-size:80%" | Resigned December 31, 1970, after being appointed to the U.S. Senate |- | | nowrap| John V. Tunney (D) | style="font-size:80%" | Resigned January 2, 1971, after being appointed to the U.S. Senate |} Committees Senate Aeronautical and Space Sciences (Chair: Clinton P. Anderson; Ranking Member: Margaret Chase Smith) Agriculture and Forestry (Chair: Allen J. Ellender; Ranking Member: George D. Aiken) Appropriations (Chair: Richard B. Russell; Ranking Member: Milton R. Young) Armed Services (Chair: John C. Stennis; Ranking Member: Margaret Chase Smith) Banking and Currency (Chair: John J. Sparkman; Ranking Member: Wallace F. Bennett) Commerce (Chair: Warren G. Magnuson; Ranking Member: Norris Cotton) District of Columbia (Chair: Joseph D. Tydings; Ranking Member: Winston L. Prouty) Equal Educational Opportunity (Select) (Chair: ; Ranking Member: ) Finance (Chair: Russell B. Long; Ranking Member: John J. Williams) Foreign Relations (Chair: J. William Fulbright; Ranking Member: George D. Aiken) Government Operations (Chair: John Little McClellan; Ranking Member: Karl E. Mundt) Interior and Insular Affairs (Chair: Henry M. Jackson; Ranking Member: Gordon Allott) Judiciary (Chair: James O. Eastland; Ranking Member: Everett M. Dirksen) Labor and Public Welfare (Chair: Ralph W. Yarborough; Ranking Member: Jacob K. Javits) Nutrition and Human Needs (Select) (Chair: George S. McGovern) Post Office and Civil Service (Chair: Gale W. McGee; Ranking Member: Hiram Fong) Public Works (Chair: Jennings Randolph; Ranking Member: John Sherman Cooper) Rules and Administration (Chair: B. Everett Jordan; Ranking Member: Carl