Republican | 1938 | | Incumbent died September 16, 1939.New member elected.Republican hold. | nowrap | |- ! | Harry R. Sheppard | | Democratic | 1936 | Incumbent re-elected. | nowrap | |- ! | Edouard Izac | | Democratic | 1936 | Incumbent re-elected. | nowrap | |} Colorado |- ! | Lawrence Lewis | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | Fred N. Cummings | | Democratic | 1932 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | John Andrew Martin | | Democratic | 1932 | | Incumbent died December 23, 1939.New member elected.Republican gain.Winner did not run to finish the current term. | nowrap | |- ! | Edward T. Taylor | | Democratic | 1908 | Incumbent re-elected. | nowrap | |} Connecticut |- ! | William J. Miller | | Republican | 1938 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Thomas R. Ball | | Republican | 1938 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | James A. Shanley | | Democratic | 1934 | Incumbent re-elected. | nowrap | |- ! | Albert E. Austin | | Republican | 1938 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | J. Joseph Smith | | Democratic | 1934 | Incumbent re-elected. | nowrap | |- ! | B. J. Monkiewicz | | Republican | 1938 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |} Delaware |- ! | George S. Williams | | Republican | 1938 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |} Florida |- ! | J. Hardin Peterson | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | Robert A. Green | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | Millard F. Caldwell | | Democratic | 1932 | | Incumbent retired to run for U.S. senator.New member elected.Democratic hold. | nowrap | |- ! | Pat Cannon | | Democratic | 1938 | Incumbent re-elected. | nowrap | |- ! | Joe Hendricks | | Democratic | 1936 | Incumbent re-elected. | nowrap | |} Georgia |- ! | Hugh Peterson | | Democratic | 1934 | Incumbent re-elected. | nowrap | |- !