re-elected. | nowrap | |- ! | Leo E. Allen | | Republican | 1932 | Incumbent re-elected. | nowrap | |- ! | Anton J. Johnson | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | Robert B. Chiperfield | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | Everett Dirksen | | Republican | 1932 | Incumbent re-elected. | nowrap | |- ! | Leslie C. Arends | | Republican | 1934 | Incumbent re-elected. | nowrap | |- ! | Jessie Sumner | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | William H. Wheat | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | James M. Barnes | | Democratic | 1938 | Incumbent re-elected. | nowrap | |- ! | Frank W. Fries | | Democratic | 1936 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | Edwin M. Schaefer | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | Laurence F. Arnold | | Democratic | 1936 | Incumbent re-elected. | nowrap | |- ! | Claude V. Parsons | | Democratic | 1930 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | Kent E. Keller | | Democratic | 1930 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | John C. Martin | | Democratic | 1938 | | Republican gain. | rowspan=2 nowrap | |- ! | Thomas Vernor Smith | | Democratic | 1938 | | Republican gain. |} Indiana |- ! | William T. Schulte | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | Charles A. Halleck | | Republican | 1935 | Incumbent re-elected. | nowrap | |- ! | Robert A. Grant | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | George W. Gillie | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | Forest A. Harness | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | Noble J. Johnson | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | Gerald W. Landis | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | John W. Boehne Jr.