! | John Culver | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | H. R. Gross | | Republican | 1948 | Incumbent re-elected. | nowrap | |- ! | Bert Bandstra | | Democratic | 1964 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | Neal Edward Smith | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Stanley L. Greigg | | Democratic | 1964 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | John R. Hansen | | Democratic | 1964 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |} Kansas |- ! | Bob Dole | | Republican | 1960 | Incumbent re-elected. | nowrap | |- ! | Chester L. Mize | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | Robert Ellsworth | | Republican | 1960 | | Incumbent retired to run for U.S. senator.New member elected.Republican hold. | nowrap | |- ! | Garner E. Shriver | | Republican | 1960 | Incumbent re-elected. | nowrap | |- ! | Joe Skubitz | | Republican | 1962 | Incumbent re-elected. | nowrap | |} Kentucky |- ! | Frank Stubblefield | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | William Natcher | | Democratic | 1953 | Incumbent re-elected. | nowrap | |- ! | Charles R. Farnsley | | Democratic | 1964 | | Incumbent retired.New member elected.Republican gain. | nowrap | |- ! | Frank Chelf | | Democratic | 1944 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | Tim Lee Carter | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | John C. Watts | | Democratic | 1951 | Incumbent re-elected. | nowrap | |- ! | Carl D. Perkins | | Democratic | 1948 | Incumbent re-elected. | nowrap | |} Louisiana |- ! | F. Edward Hébert | | Democratic | 1940 | Incumbent re-elected. | nowrap | |- ! | Hale Boggs | | Democratic | 19401942 1946 | Incumbent re-elected. | nowrap | |- ! | Edwin E. Willis | | Democratic | 1948 | Incumbent re-elected. | nowrap | |- ! | Joe Waggonner | | Democratic | 1961 | Incumbent re-elected.