|- ! | Joseph M. McDade | | Republican | 1962 | Incumbent re-elected. | nowrap | |- ! | Dan Flood | | Democratic | 19441946 19481952 1954 | Incumbent re-elected. | nowrap | |- ! | John Murtha | | Democratic | 1974 | Incumbent re-elected. | nowrap | |- ! | Lawrence Coughlin | | Republican | 1968 | Incumbent re-elected. | nowrap | |- ! | William S. Moorhead | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Fred B. Rooney | | Democratic | 1963 | Incumbent re-elected. | nowrap | |- ! | Edwin D. Eshleman | | Republican | 1966 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | Herman T. Schneebeli | | Republican | 1960 | | Incumbent retired.New member elected.Democratic gain. | nowrap | |- ! | John Heinz | | Republican | 1971 | | Incumbent retired to run for U.S. senator.New member elected.Democratic gain. | nowrap | |- ! | William F. Goodling | | Republican | 1974 | Incumbent re-elected. | nowrap | |- ! | Joseph M. Gaydos | | Democratic | 1968 | Incumbent re-elected. | nowrap | |- ! | John Herman Dent | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Thomas E. Morgan | | Democratic | 1944 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | Albert W. Johnson | | Republican | 1963 | | Lost re-electionDemocratic gain. | nowrap | |- ! | Joseph P. Vigorito | | Democratic | 1964 | | Lost re-electionRepublican gain. | nowrap | |- ! | Gary A. Myers | | Republican | 1974 | Incumbent re-elected. | nowrap | |} Rhode Island |- ! | Fernand St. Germain | | Democratic | 1960 | Incumbent re-elected. | nowrap | |- ! | Edward Beard | | Democratic | 1974 | Incumbent re-elected. | nowrap | |} South Carolina |- ! | Mendel Jackson Davis | | Democratic | 1971 | Incumbent re-elected. | nowrap | |- ! | Floyd Spence | | Republican | 1970 | Incumbent re-elected. | nowrap | |- ! | Butler Derrick | | Democratic | 1974 | Incumbent re-elected. | nowrap | |- ! | James Mann | | Democratic | 1968 | Incumbent re-elected. | nowrap | |-