| Charles B. Timberlake | | Republican | 1914 | Incumbent re-elected. | nowrap | |- ! | Edward Keating | | Democratic | 1912 | Incumbent re-elected. | nowrap | |- ! | Edward T. Taylor | | Democratic | 1908 | Incumbent re-elected. | nowrap | |} Connecticut Delaware |- ! | Thomas W. Miller | | Republican | 1914 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |} Florida Georgia Idaho |- ! rowspan=2 | | Robert M. McCracken | | Republican | nowrap | 1914 | | Incumbent lost renomination.New member elected.Republican hold. | nowrap rowspan=2 | |- | Addison T. Smith | | Republican | nowrap | 1912 | Incumbent re-elected. |} Illinois Indiana |- ! | Charles Lieb | | Democratic | 1912 | | Incumbent retired.New member elected.Democratic hold. |nowrap | |- ! | William A. Cullop | | Democratic | 1908 | | Incumbent lost re-election.New member elected.Republican gain. |nowrap | |- ! | William E. Cox | | Democratic | 1906 | Incumbent re-elected. |nowrap | |- ! | Lincoln Dixon | | Democratic | 1904 | Incumbent re-elected. |nowrap | |- ! | Ralph Wilbur Moss | | Democratic | 1908 | | Incumbent lost re-election.New member elected.Republican gain. |nowrap | |- ! | Finly H. Gray | | Democratic | 1910 | | Incumbent lost re-election.New member elected.Republican gain. |nowrap | |- ! | Merrill Moores | | Republican | 1914 | Incumbent re-elected. |nowrap | |- ! | John A. M. Adair | | Democratic | 1906 | | Incumbent retired to run for Governor of Indiana.New member elected.Republican gain. |nowrap | |- ! | Martin A. Morrison | | Democratic | 1908 | | Incumbent retired.New member elected.Republican gain. |nowrap | |- ! | William R. Wood | | Republican | 1914 | Incumbent re-elected. |nowrap | |- ! | George W. Rauch | | Democratic | 1906 | | Incumbent lost re-election.New member elected.Republican gain. |nowrap | |- ! | Cyrus Cline | | Democratic | 1908 | | Incumbent lost re-election.New member elected.Republican gain. |nowrap | |- ! | Henry A. Barnhart | | Democratic | 1908 | Incumbent re-elected. |nowrap | |} Iowa |- ! | Charles A. Kennedy | |Republican | 1906 | Incumbent re-elected. | nowrap | |- ! | Harry E. Hull | |Republican | 1914 | Incumbent