| | Democratic | 1950 | Incumbent re-elected. | nowrap | |- ! | Jed Johnson Jr. | | Democratic | 1964 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |} Oregon |- ! | Wendell Wyatt | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | Al Ullman | | Democratic | 1956 | Incumbent re-elected. | nowrap | |- ! | Edith Green | | Democratic | 1954 | Incumbent re-elected. | nowrap | |- ! | Robert B. Duncan | | Democratic | 1962 | | Incumbent retired to run for U.S. Senator.New member elected.Republican gain. | nowrap | |} Pennsylvania |- ! | William A. Barrett | | Democratic | 19441946 1948 | Incumbent re-elected. | nowrap | |- ! | Robert N. C. Nix Sr. | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | James A. Byrne | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- ! | Herman Toll | | Democratic | 1958 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | William J. Green III | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | George M. Rhodes | | Democratic | 1948 | Incumbent re-elected. | nowrap | |- ! | colspan=3 | None (District created) | | New seat.New member elected.Republican gain. | nowrap | |- ! | Willard S. Curtin | | Republican | 1956 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! rowspan=2 | | George Watkins | | Republican | 1964 | Incumbent re-elected. | rowspan=2 nowrap | |- | Paul B. Dague | | Republican | 1946 | | Incumbent retired.Republican loss. |- ! | Joseph M. McDade | | Republican | 1962 | Incumbent re-elected. | nowrap | |- ! | Dan Flood | | Democratic | 19441946 19481952 1954 | Incumbent re-elected. | nowrap | |- ! | J. Irving Whalley | | Republican | 1960 | Incumbent re-elected. | nowrap | |- ! | Richard Schweiker | | Republican | 1960 | Incumbent re-elected. | nowrap | |- ! | William S. Moorhead | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Fred B. Rooney | | Democratic | 1963 | Incumbent re-elected. | nowrap | |- ! | John C.