Donald Rumsfeld | | Republican | 1962 | Incumbent re-elected. | |- | | Elmer J. Hoffman | | Republican | 1958 | | Incumbent retired.New member elected.Republican hold. | |- | | Charlotte Thompson Reid | | Republican | 1962 | Incumbent re-elected. | |- | | John B. Anderson | | Republican | 1960 | Incumbent re-elected. | |- | | Leslie C. Arends | | Republican | 1934 | Incumbent re-elected. | |- | | Robert H. Michel | | Republican | 1956 | Incumbent re-elected. | |- | | Robert T. McLoskey | | Republican | 1962 | | Incumbent lost re-election.New member elected.Democratic gain. | |- | | Paul Findley | | Republican | 1960 | Incumbent re-elected. | |- | | Kenneth J. Gray | | Democratic | 1954 | Incumbent re-elected. | |- | | William L. Springer | | Republican | 1950 | Incumbent re-elected. | |- | | George E. Shipley | | Democratic | 1958 | Incumbent re-elected. | |- | | Melvin Price | | Democratic | 1944 | Incumbent re-elected. | |} Indiana |- | | Ray Madden | | Democratic | 1942 | Incumbent re-elected. | nowrap | |- | | Charles A. Halleck | | Republican | 1935 | Incumbent re-elected. | nowrap | |- | | John Brademas | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- | | E. Ross Adair | | Republican | 1950 | Incumbent re-elected. | nowrap | |- | | J. Edward Roush | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- | | Richard L. Roudebush | | Republican | 1960 | Incumbent re-elected. | nowrap | |- | | William G. Bray | | Republican | 1950 | Incumbent re-elected. | nowrap | |- | | Winfield K. Denton | | Democratic | 1954 | Incumbent re-elected. | nowrap | |- | | Earl Wilson | | Republican | 1960 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- | | Ralph Harvey | | Republican | 1960 | Incumbent re-elected. | nowrap | |- | | Donald C. Bruce | | Republican | 1960 | | Incumbent retired to run for U.S. Senator.New member elected.Democratic gain. | nowrap | |} Iowa |- | | Fred Schwengel | | Republican | 1954 | | Incumbent lost re-election.New member