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 | |- ! rowspan=2 | | John E. Porter | | Republican | 1980 | Incumbent re-elected. | rowspan=2 | |- | Robert McClory | | Republican | 1962 | | Incumbent retired.Republican loss. |- ! | Frank Annunzio | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | Phil Crane | | Republican | 1969 | Incumbent re-elected. | nowrap | |- ! | John N. Erlenborn | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | Tom Corcoran | | Republican | 1976 | Incumbent re-elected. | nowrap | |- ! | Edward Rell Madigan | | Republican | 1972 | Incumbent re-elected. | nowrap | |- ! | Lynn Morley Martin | | Republican | 1980 | Incumbent re-elected. | nowrap | |- ! | Tom Railsback | | Republican | 1966 | | Incumbent lost renomination.New member elected.Democratic gain. | nowrap | |- ! | Robert H. Michel | | Republican | 1956 | Incumbent re-elected. | nowrap | |- ! | Dan Crane | | Republican | 1978 | Incumbent re-elected. | nowrap | |- ! | Paul Findley | | Republican | 1960 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Melvin Price | | Democratic | 1944 | Incumbent re-elected. | nowrap | |- ! | Paul Simon | | Democratic | 1974 | Incumbent re-elected. | nowrap | |} Indiana Indiana lost one seat at reapportionment; Republicans in the legislature deleted two Democratic districts and added a new Republican district, although this strategy was offset by the unexpected defeat of incumbent H. Joel Deckard. |- ! | Adam Benjamin Jr. | | Democratic | 1976 | | Incumbent died.New member elected.Democratic hold. | nowrap | |- ! | Philip R. Sharp | | Democratic | 1974 | Incumbent re-elected. | nowrap | |- ! | John P. Hiler | | Republican | 1980 | Incumbent re-elected. | nowrap | |- !