elected.Democratic hold. | nowrap | |- ! | Robert Grier Stephens Jr. | | Democratic | 1960 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |} Hawaii |- ! | Spark Matsunaga | | Democratic | 1962 | | Incumbent retired to run for U.S. senator.New member elected.Democratic hold. | nowrap | |- ! | Patsy Mink | | Democratic | 1964 | | Incumbent retired to run for U.S. senator.New member elected.Democratic hold. | nowrap | |} Idaho |- ! | Steve Symms | | Republican | 1972 | Incumbent re-elected. | nowrap | |- ! | George V. Hansen | | Republican | 19641968 1974 | Incumbent re-elected. | nowrap | |} Illinois |- ! | Ralph Metcalfe | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | Morgan F. Murphy | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | Marty Russo | | Democratic | 1974 | Incumbent re-elected. | nowrap | |- ! | Ed Derwinski | | Republican | 1958 | Incumbent re-elected. | nowrap | |- ! | John G. Fary | | Democratic | 1975 | Incumbent re-elected. | nowrap | |- ! | Henry Hyde | | Republican | 1974 | Incumbent re-elected. | nowrap | |- ! | Cardiss Collins | | Democratic | 1973 | 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 | 19681972 1974 | Incumbent re-elected. | nowrap | |- ! | Frank Annunzio | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | Phil Crane | | Republican | 1969 | Incumbent re-elected. | nowrap | |- ! | Robert McClory | | Republican | 1962 | Incumbent re-elected. | nowrap | |- ! | John N. Erlenborn | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | Tim Lee Hall | | Democratic | 1974 | | Lost re-electionRepublican gain. | nowrap | |- ! | John B. Anderson | | Republican | 1960 | Incumbent re-elected. | nowrap | |- ! | George M. O'Brien | | Republican | 1972 | Incumbent re-elected. | nowrap |