! | J. Russell Tuten | | Democratic | 1962 | | Incumbent lost renomination.New member elected.Democratic hold. | 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. | rowspan=2 nowrap | |- ! | Patsy Mink | | Democratic | 1964 | Incumbent re-elected. |} Idaho |- ! | Compton I. White Jr. | | Democratic | 1962 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | George V. Hansen | | Republican | 1964 | Incumbent re-elected. | nowrap | |} Illinois |- ! | William L. Dawson | | Democratic | 1942 | Incumbent re-elected. | nowrap | |- ! | Barratt O'Hara | | Democratic | 19481950 1952 | Incumbent re-elected. | nowrap | |- ! | William T. Murphy | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Ed Derwinski | | Republican | 1958 | Incumbent re-elected. | nowrap | |- ! | John C. Kluczynski | | Democratic | 1950 | Incumbent re-elected. | nowrap | |- ! | Daniel J. Ronan | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | Frank Annunzio | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | Dan Rostenkowski | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Sidney R. Yates | | Democratic | 19481962 1964 | Incumbent re-elected. | nowrap | |- ! | Harold R. Collier | | Republican | 1956 | Incumbent re-elected. | nowrap | |- ! | Roman Pucinski | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Robert McClory | | Republican | 1962 | Incumbent re-elected. | nowrap | |- ! | Donald Rumsfeld | | Republican | 1962 | Incumbent re-elected. | nowrap | |- ! | John N. Erlenborn | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | Charlotte Thompson Reid | | Republican | 1962 | Incumbent re-elected. | nowrap | |- ! | John B. Anderson | | Republican | 1960 | Incumbent re-elected. | nowrap | |-