Waggonner | | Democratic | 1961 | Incumbent re-elected. | nowrap | |- | | Otto Passman | | Democratic | 1946 | Incumbent re-elected. | nowrap | |- | | James H. Morrison | | Democratic | 1942 | Incumbent re-elected. | nowrap | |- | | T. Ashton Thompson | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- | | Gillis William Long | | Democratic | 1962 | | Incumbent lost renomination.New member elected.Democratic hold. | nowrap | |} Maine |- | | Stanley R. Tupper | | Republican | 1960 | Incumbent re-elected. | nowrap | |- | | Clifford McIntire | | Republican | 1951 | | Incumbent retired to run for U.S. Senator.New member elected.Democratic gain. | nowrap | |} Maryland |- | | Rogers Morton | | Republican | 1962 | Incumbent re-elected. | nowrap | |- | | Clarence Long | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- | | Edward Garmatz | | Democratic | 1947 | Incumbent re-elected. | nowrap | |- | | George Hyde Fallon | | Democratic | 1944 | Incumbent re-elected. | nowrap | |- | | Richard Lankford | | Democratic | 1954 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- | | Charles Mathias | | Republican | 1960 | Incumbent re-elected. | nowrap | |- | | Samuel Friedel | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- | | Carlton R. Sickles | | Democratic | 1962 | Incumbent re-elected. | nowrap | |} Massachusetts |- | | Silvio O. Conte | | Republican | 1958 | Incumbent re-elected. | nowrap | |- | | Edward Boland | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- | | Philip J. Philbin | | Democratic | 1942 | Incumbent re-elected. | nowrap | |- | | Harold Donohue | | Democratic | 1946 | Incumbent re-elected. | nowrap | |- | | F. Bradford Morse | | Republican | 1960 | Incumbent re-elected. | nowrap | |- | | William H. Bates | | Republican | 1950 | Incumbent re-elected. | nowrap | |- | | Torbert Macdonald | | Democratic | 1954 | Incumbent re-elected. | nowrap | |- | | Tip O'Neill | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- |