| |- | | Ronald B. Cameron | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- | | James Roosevelt | | Democratic | 1954 | Incumbent re-elected. | nowrap | |- | | Everett G. Burkhalter | | Democratic | 1962 | | Incumbent retired.New member elected.Republican gain. | nowrap | |- | | Alphonzo E. Bell Jr. | | Republican | 1960 | Incumbent re-elected. | nowrap | |- | | George Brown Jr. | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- | | Edward R. Roybal | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- | | Charles H. Wilson | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- | | Craig Hosmer | | Republican | 1952 | Incumbent re-elected. | nowrap | |- | | Harry R. Sheppard | | Democratic | 1936 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- | | Richard T. Hanna | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- | | James B. Utt | | Republican | 1952 | Incumbent re-elected. | nowrap | |- | | Bob Wilson | | Republican | 1952 | Incumbent re-elected. | nowrap | |- | | Lionel Van Deerlin | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- | | Patrick M. Martin | | Republican | 1962 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |} Colorado |- | | Byron G. Rogers | | Democratic | 1950 | Incumbent re-elected. | nowrap | |- | | Donald G. Brotzman | | Republican | 1962 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- | | John Chenoweth | | Republican | 1950 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- | | Wayne N. Aspinall | | Democratic | 1948 | Incumbent re-elected. | nowrap | |} Connecticut Connecticut eliminated its at-large seat and redistricted from 5 districts to 6, creating a new district in the northwestern part of the state. |- | | Emilio Q. Daddario | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- | | William St. Onge | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- | | Robert Giaimo | | Democratic | 1958 | Incumbent