Incumbent re-elected. | nowrap | |} Kentucky |- ! | Frank Stubblefield | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | William Natcher | | Democratic | 1953 | Incumbent re-elected. | nowrap | |- ! | William Cowger | | Republican | 1966 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Gene Snyder | | Republican | 19621964 1966 | Incumbent re-elected. | nowrap | |- ! | Tim Lee Carter | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | John C. Watts | | Democratic | 1951 | Incumbent re-elected. | nowrap | |- ! | Carl D. Perkins | | Democratic | 1948 | Incumbent re-elected. | nowrap | |} Louisiana |- ! | F. Edward Hébert | | Democratic | 1940 | Incumbent re-elected. | nowrap | |- ! | Hale Boggs | | Democratic | 19401942 1946 | Incumbent re-elected. | nowrap | |- ! | Patrick T. Caffery | | Democratic | 1968 | Incumbent re-elected. | nowrap | |- ! | Joe Waggonner | | Democratic | 1961 | Incumbent re-elected. | nowrap | |- ! | Otto Passman | | Democratic | 1946 | Incumbent re-elected. | nowrap | |- ! | John Rarick | | Democratic | 1966 | Incumbent re-elected. | nowrap | |- ! | Edwin Edwards | | Democratic | 1965 | Incumbent re-elected. | nowrap | |- ! | Speedy Long | | Democratic | 1964 | Incumbent re-elected. | nowrap | |} Maine |- ! | Peter Kyros | | Democratic | 1966 | Incumbent re-elected. | nowrap | |- ! | William Hathaway | | Democratic | 1964 | Incumbent re-elected. | 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 lost renomination.New member elected.Democratic hold. | nowrap | |- ! | Lawrence Hogan | | Republican | 1968 | Incumbent re-elected. | nowrap | |- ! | J. Glenn Beall Jr. | | Republican | 1968 | | Incumbent retired to