Incumbent re-elected. | nowrap | |- | | Robert W. Hemphill | | Democratic | 1956 | | Resigned when appointed to United States District Court for the Eastern District of South CarolinaDemocratic hold. | nowrap | |- | | John L. McMillan | | Democratic | 1938 | Incumbent re-elected. | nowrap | |} South Dakota |- | | Ben Reifel | | Republican | 1960 | Incumbent re-elected. | nowrap | |- | | Ellis Yarnal Berry | | Republican | 1950 | Incumbent re-elected. | nowrap | |} Tennessee |- | | Jimmy Quillen | | Republican | 1962 | Incumbent re-elected. | nowrap | |- | | Irene Baker | | Republican | 1964 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- | | Bill Brock | | Republican | 1962 | Incumbent re-elected. | nowrap | |- | | Joe L. Evins | | Democratic | 1946 | Incumbent re-elected. | nowrap | |- | | Richard Fulton | | Democratic | 1946 | Incumbent re-elected. | nowrap | |- | | Ross Bass | | Democratic | 1954 | | Incumbent retired to run for U.S. Senator.New member elected.Democratic hold. | nowrap | |- | | Tom J. Murray | | Democratic | 1942 | Incumbent re-elected. | nowrap | |- | | Fats Everett | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- | | Clifford Davis | | Democratic | 1940 | | Incumbent lost renomination.New member elected.Democratic hold. | nowrap | |} Texas |- | | Wright Patman | | Democratic | 1928 | Incumbent re-elected. | nowrap | |- | | Jack Brooks | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- | | Lindley Beckworth | | Democratic | 1956 | Incumbent re-elected. | nowrap | |- | | Ray Roberts | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- | | Bruce Alger | | Republican | 1954 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- | | Olin E. Teague | | Democratic | 1946 | Incumbent re-elected. | nowrap | |- | | John Dowdy | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- | | Albert Thomas | | Democratic | 1936 | Incumbent re-elected. | nowrap | |- | | Clark W. Thompson | |