1970 | Incumbent re-elected. | nowrap | |- ! | Jack Brinkley | | Democratic | 1966 | Incumbent re-elected. | nowrap | |- ! | Benjamin B. Blackburn | | Republican | 1966 | Incumbent re-elected. | nowrap | |- ! | Fletcher Thompson | | Republican | 1966 | | Retired to run for U.S. Senator.New member elected.Democratic gain. | nowrap | |- ! | John Flynt | | Democratic | 1954 | Incumbent re-elected. | nowrap | |- ! | John William Davis | | Democratic | 1960 | Incumbent re-elected. | nowrap | |- ! | W. S. Stuckey Jr. | | Democratic | 1966 | Incumbent re-elected. | nowrap | |- ! | Phillip M. Landrum | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- ! | Robert Grier Stephens Jr. | | Democratic | 1960 | Incumbent re-elected. | nowrap | |} Hawaii |- ! | Spark Matsunaga | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- ! | Patsy Mink | | Democratic | 1964 | Incumbent re-elected. | nowrap | |} Idaho |- ! | James A. McClure | | Republican | 1966 | | Retired to run for U.S. Senator.New member elected.Republican hold. | nowrap | |- ! | Orval H. Hansen | | Republican | 1968 | Incumbent re-elected. | nowrap | |} Illinois |- ! | Ralph Metcalfe | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | Morgan F. Murphy | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | colspan=3 | None (district created) | | New seat.New member elected.Republican gain. | nowrap | |- ! | Ed Derwinski | | Republican | 1958 | Incumbent re-elected. | nowrap | |- ! | John C. Kluczynski | | Democratic | 1950 | Incumbent re-elected. | nowrap | |- ! | Harold R. Collier | | Republican | 1956 | Incumbent re-elected. | nowrap | |- ! | George W. Collins | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | Dan Rostenkowski | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Sidney R. Yates | | Democratic | 19481962 1964 | Incumbent re-elected. | nowrap | |- ! | Abner Mikva | | Democratic | 1968 | | Incumbent lost re-election.New member elected.Republican gain.