Ray Madden | | Democratic | 1942 | Incumbent re-elected. | nowrap | |- ! | Earl Landgrebe | | Republican | 1968 | Incumbent re-elected. | nowrap | |- ! | John Brademas | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | E. Ross Adair | | Republican | 1950 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Richard L. Roudebush | | Republican | 1960 | | Incumbent retired to run for U.S. senator.New member elected.Republican hold. | nowrap | |- ! | William G. Bray | | Republican | 1950 | Incumbent re-elected. | nowrap | |- ! | John T. Myers | | Republican | 1966 | Incumbent re-elected. | nowrap | |- ! | Roger H. Zion | | Republican | 1966 | Incumbent re-elected. | nowrap | |- ! | Lee H. Hamilton | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | David W. Dennis | | Republican | 1968 | Incumbent re-elected. | nowrap | |- ! | Andrew Jacobs Jr. | | Democratic | 1964 | Incumbent re-elected. | nowrap | |} Iowa |- ! | Fred Schwengel | | Republican | 19541964 1966 | Incumbent re-elected. | nowrap | |- ! | John Culver | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | H. R. Gross | | Republican | 1948 | Incumbent re-elected. | nowrap | |- ! | John Henry Kyl | | Republican | 1959 1964 1966 | Incumbent re-elected. | nowrap | |- ! | Neal Edward Smith | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Wiley Mayne | | Republican | 1966 | Incumbent re-elected. | nowrap | |- ! | William J. Scherle | | Republican | 1966 | Incumbent re-elected. | nowrap | |} Kansas |- ! | Keith Sebelius | | Republican | 1968 | Incumbent re-elected. | nowrap | |- ! | Chester L. Mize | | Republican | 1964 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Larry Winn | | Republican | 1966 | Incumbent re-elected. | nowrap | |- ! | Garner E. Shriver | | Republican | 1960 | Incumbent re-elected. | nowrap | |- ! | Joe Skubitz | | Republican | 1962 |