Incumbent re-elected. | nowrap | |- ! | Robert L. Leggett | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- ! | Phillip Burton | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | William S. Mailliard | | Republican | 1952 | Incumbent re-elected. | nowrap | |- ! | Jeffery Cohelan | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | George P. Miller | | Democratic | 1944 | Incumbent re-elected. | nowrap | |- ! | Don Edwards | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- ! | Charles S. Gubser | | Republican | 1952 | Incumbent re-elected. | nowrap | |- ! | J. Arthur Younger | | Republican | 1952 | Incumbent re-elected. | nowrap | |- ! | Burt L. Talcott | | Republican | 1962 | Incumbent re-elected. | nowrap | |- ! | Charles M. Teague | | Republican | 1954 | Incumbent re-elected. | nowrap | |- ! | Jerome Waldie | | Democratic | 1966 | Incumbent re-elected. | nowrap | |- ! | John J. McFall | | Democratic | 1956 | Incumbent re-elected. | nowrap | |- ! | B. F. Sisk | | Democratic | 1954 | Incumbent re-elected. | nowrap | |- ! | Cecil R. King | | Democratic | 1942 | Incumbent re-elected. | nowrap | |- ! | Harlan Hagen | | Democratic | 1952 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | Chet Holifield | | Democratic | 1942 | Incumbent re-elected. | nowrap | |- ! | H. Allen Smith | | Republican | 1956 | Incumbent re-elected. | nowrap | |- ! | Augustus Hawkins | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- ! | James C. Corman | | Democratic | 1960 | Incumbent re-elected. | nowrap | |- ! | Del M. Clawson | | Republican | 1963 | Incumbent re-elected. | nowrap | |- ! | Glenard P. Lipscomb | | Republican | 1953 | Incumbent re-elected. | nowrap | |- ! | Ronald B. Cameron | | Democratic | 1962 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | Thomas M. Rees | | Democratic | 1965 | Incumbent re-elected. | nowrap | |-