| | | R. James Harvey (R) | style="font-size:80%" | Resigned January 31, 1974, after being appointed as a judge of the US District Court of the Eastern District of Michigan. | | J. Bob Traxler (D) | April 23, 1974 |- | | | William S. Mailliard (R) | style="font-size:80%" | Resigned March 5, 1974. | | John Burton (D) | June 4, 1974 |- | | | Charles Gubser (R) | style="font-size:80%" | Resigned December 31, 1974. | colspan=2 rowspan=28| Remained vacant until next Congress |- | | | Chester E. Holifield (D) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Craig Hosmer (R) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Richard T. Hanna (D) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Leslie C. Arends (R) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Kenneth J. Gray (D) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Frank Stubblefield (D) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Harold Donohue (D) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Charles E. Chamberlain (R) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Martha Griffiths (D) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Ancher Nelsen (R) | style="font-size:80%" | Resigned December 31, 1974. |- | | | John Blatnik (DFL) | style="font-size:80%" | Resigned December 31, 1974. |- | | | David Martin (R) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Louis C. Wyman (R) | style="font-size:80%" | Resigned December 31, 1974, after being appointed to the U.S. Senate. |- | | | William B. Widnall (R) | style="font-size:80%" | Resigned December 31, 1974. |- | | | John J. Rooney (D) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Hugh Carey (D) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Carleton J. King (R) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Thaddeus J. Dulski (D) | style="font-size:80%" | Resigned December 31, 1974. |- | | | William Edwin Minshall Jr. (R) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Edith Green (D) | style="font-size:80%" | Resigned December 31, 1974. |- | | | Frank M. Clark (D) | style="font-size:80%" | Resigned December 31,