| Republican | 1973 | Incumbent re-elected. | nowrap | |- ! | Clarence Long | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- ! | Paul Sarbanes | | Democratic | 1970 | | Incumbent retired to run for U.S. senator.New member elected.Democratic hold. | nowrap | |- ! | Marjorie Holt | | Republican | 1972 | Incumbent re-elected. | nowrap | |- ! | Gladys Spellman | | Democratic | 1974 | Incumbent re-elected. | nowrap | |- ! | Goodloe Byron | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | Parren Mitchell | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | Gilbert Gude | | Republican | 1966 | | Incumbent retired.New member elected.Republican hold. | nowrap | |} Massachusetts |- ! | Silvio O. Conte | | Republican | 1958 | Incumbent re-elected. | nowrap | |- ! | Edward Boland | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- ! | Joseph D. Early | | Democratic | 1974 | Incumbent re-elected. | nowrap | |- ! | Robert Drinan | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | Paul Tsongas | | Democratic | 1974 | Incumbent re-elected. | nowrap | |- ! | Michael J. Harrington | | Democratic | 1969 | Incumbent re-elected. | nowrap | |- ! | Torbert Macdonald | | Democratic | 1954 | | Incumbent died May 21, 1976.New member elected.Democratic hold.Winner was also elected to finish the term, see above. | nowrap | |- ! | Tip O'Neill | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- ! | Joe Moakley | | Democratic | 1972 | Incumbent re-elected. | nowrap | |- ! | Margaret Heckler | | Republican | 1966 | Incumbent re-elected. | nowrap | |- ! | James A. Burke | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Gerry Studds | | Democratic | 1972 | Incumbent re-elected. | nowrap | |} Michigan |- ! | John Conyers | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | Marvin L. Esch | | Republican | 1966 | | Incumbent retired to run for U.S. senator.New member elected.Republican hold. | nowrap | |- ! | Garry E. Brown |