| nowrap | |} South Carolina |- ! | Mendel Jackson Davis | | Democratic | 1971 | Incumbent re-elected. | nowrap | |- ! | Floyd Spence | | Republican | 1970 | Incumbent re-elected. | nowrap | |- ! | William Jennings Bryan Dorn | | Democratic | 19461948 1950 | Incumbent re-elected. | nowrap | |- ! | James R. Mann | | Democratic | 1968 | Incumbent re-elected. | nowrap | |- ! | Thomas S. Gettys | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | John L. McMillan | | Democratic | 1938 | | Incumbent lost renomination.New member elected.Republican gain. | nowrap | |} South Dakota |- ! | Frank E. Denholm | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | James Abourezk | | Democratic | 1970 | | Retired to run for U.S. Senator.New member elected.Republican gain. | nowrap | |} Tennessee |- ! | Jimmy Quillen | | Republican | 1962 | Incumbent re-elected. | nowrap | |- ! | John Duncan Sr. | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | LaMar Baker | | Republican | 1970 | Incumbent re-elected. | nowrap | |- ! | Joe L. Evins | | Democratic | 1946 | Incumbent re-elected. | nowrap | |- ! | Richard Fulton | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- ! rowspan=2 | | William Anderson | | Democratic | 1964 | | Incumbent lost re-election.New member elected.Republican gain. | rowspan=2 nowrap | |- | Ray Blanton | | Democratic | 1966 | | Incumbent retired to run for U.S. senator.Democratic loss. |- ! | Ed Jones | | Democratic | 1969 | Incumbent re-elected. | nowrap | |- ! | Dan Kuykendall | | Republican | 1966 | Incumbent re-elected. | nowrap | |} Texas |- ! | Wright Patman | | Democratic | 1928 | Incumbent re-elected. | nowrap | |- ! | John Dowdy | | Democratic | 1952 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | James M. Collins | | Republican | 1968 | Incumbent re-elected. | nowrap | |- ! | Ray Roberts | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- ! | Earle Cabell | | Democratic | 1964 | |