| Republican | 1970 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | Thomas L. Ashley | | Democratic | 1954 | Incumbent re-elected. | nowrap | |- ! | Clarence E. Miller | | Republican | 1966 | Incumbent re-elected. | nowrap | |- ! | J. William Stanton | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | Samuel L. Devine | | Republican | 1958 | Incumbent re-elected. | nowrap | |- ! | Charles Adams Mosher | | Republican | 1960 | Incumbent re-elected. | nowrap | |- ! | John F. Seiberling | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | Chalmers P. Wylie | | Republican | 1966 | Incumbent re-elected. | nowrap | |- ! | Ralph Regula | | Republican | 1972 | Incumbent re-elected. | nowrap | |- ! | John M. Ashbrook | | Republican | 1960 | Incumbent re-elected. | nowrap | |- ! | Wayne L. Hays | | Democratic | 1948 | Incumbent re-elected. | nowrap | |- ! | Charles J. Carney | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | James V. Stanton | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | Louis Stokes | | Democratic | 1968 | Incumbent re-elected. | nowrap | |- ! | Charles Vanik | | Democratic | 1954 | Incumbent re-elected. | nowrap | |- ! | William Edwin Minshall Jr. | | Republican | 1954 | | Incumbent retired.New member elected.Democratic gain. | nowrap | |} Oklahoma |- ! | James R. Jones | | Democratic | 1972 | Incumbent re-elected. | nowrap | |- ! | Clem McSpadden | | Democratic | 1972 | | Incumbent retired to run for Governor of Oklahoma.New member elected.Democratic hold. | nowrap | |- ! | Carl Albert | | Democratic | 1946 | Incumbent re-elected. | nowrap | |- ! | Tom Steed | | Democratic | 1948 | Incumbent re-elected. | nowrap | |- ! | John Jarman | | Democratic | 1950 | Incumbent re-elected. | nowrap | |- ! | John Newbold Camp | | Republican | 1968 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |} Oregon |- ! | Wendell Wyatt | | Republican | 1964 | |