1966 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | Joseph M. Gaydos | | Democratic | 1968 | Incumbent re-elected. | nowrap | |- ! | John H. Dent | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Thomas E. Morgan | | Democratic | 1944 | Incumbent re-elected. | nowrap | |- ! | Albert W. Johnson | | Republican | 1963 | Incumbent re-elected. | nowrap | |- ! | Joseph P. Vigorito | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | Frank M. Clark | | Democratic | 1954 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |} Rhode Island |- ! | Fernand St. Germain | | Democratic | 1960 | Incumbent re-elected. | nowrap | |- ! | Robert Tiernan | | Democratic | 1967 | | Incumbent lost renomination.New member elected.Democratic hold. | 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 retired to run for Governor of South Carolina.New member elected.Democratic hold. | nowrap | |- ! | James R. Mann | | Democratic | 1968 | Incumbent re-elected. | nowrap | |- ! | Thomas S. Gettys | | Democratic | 1964 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | Edward Lunn Young | | Republican | 1972 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |} South Dakota |- ! | Frank E. Denholm | | Democratic | 1970 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | James Abdnor | | Republican | 1972 | Incumbent re-elected. | nowrap | |} Tennessee |- ! | Jimmy Quillen | | Republican | 1962 | Incumbent re-elected. | nowrap | |- ! | John Duncan Sr. | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | LaMar Baker | | Republican | 1970 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Joe L. Evins | | Democratic | 1946 | Incumbent re-elected. | nowrap | |-