| |- ! | Harry P. Beam | | Democratic | 1930 | Incumbent re-elected. | nowrap | |- ! | Adolph J. Sabath | | Democratic | 1906 | Incumbent re-elected. | nowrap | |- ! | Thomas J. O'Brien | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | Leonard W. Schuetz | | Democratic | 1930 | Incumbent re-elected. | nowrap | |- ! | Leo Kocialkowski | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | Frederick A. Britten | | Republican | 1912 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | James Simpson Jr. | | Republican | 1932 | | Incumbent lost renomination.New member elected.Republican hold. | nowrap | |- ! | Frank R. Reid | | Republican | 1922 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | John T. Buckbee | | Republican | 1926 | Incumbent re-elected. | nowrap | |- ! | Leo E. Allen | | Republican | 1932 | Incumbent re-elected. | nowrap | |- ! | Chester Thompson | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | J. Leroy Adair | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | Everett Dirksen | | Republican | 1932 | Incumbent re-elected. | nowrap | |- ! | Frank Gillespie | | Democratic | 1932 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | James A. Meeks | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | Donald C. Dobbins | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | Henry T. Rainey | | Democratic | 1922 | | Incumbent died.New member elected.Democratic hold. | nowrap | |- ! | J. Earl Major | | Democratic | 1930 | | Resigned October 6, 1933 to become U.S. District Judge.New member elected.Democratic hold. | nowrap | |- ! | Edwin M. Schaefer | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | William W. Arnold | | Democratic | 1922 | Incumbent re-elected. | nowrap | |- ! | Claude V. Parsons | | Democratic | 1930 | Incumbent re-elected. | nowrap | |- ! | Kent E. Keller | | Democratic | 1930 |