Incumbent re-elected. | nowrap | |- ! | James P. Richards | | Democratic | 1932 | Incumbent re-elected. | nowrap | |- ! | John L. McMillan | | Democratic | 1938 | Incumbent re-elected. | nowrap | |} South Dakota |- ! | Karl E. Mundt | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | Francis H. Case | | Republican | 1936 | Incumbent re-elected. | nowrap | |} Tennessee |- ! | B. Carroll Reece | | Republican | 1932 | Incumbent re-elected. | nowrap | |- ! | John Jennings | | Republican | 1939 | Incumbent re-elected. | nowrap | |- ! | Estes Kefauver | | Democratic | 1939 | Incumbent re-elected. | nowrap | |- ! | Albert Gore Sr. | | Democratic | 1938 | Incumbent re-elected. | nowrap | |- ! | Joseph W. Byrns Jr. | | Democratic | 1938 | | Incumbent lost re-election.New member elected.Independent gain.Winner subsequently joined Democratic caucus. | nowrap | |- ! | W. Wirt Courtney | | Democratic | 1939 | Incumbent re-elected. | nowrap | |- ! | Herron C. Pearson | | Democratic | 1934 | Incumbent re-elected. | nowrap | |- ! | Jere Cooper | | Democratic | 1928 | Incumbent re-elected. | nowrap | |- ! | Clifford Davis | | Democratic | 1940 | Incumbent re-elected. | nowrap | |} Texas |- ! | Wright Patman | | Democratic | 1928 | Incumbent re-elected. | nowrap | |- ! | Martin Dies Jr. | | Democratic | 1930 | Incumbent re-elected. | nowrap | |- ! | Lindley Beckworth | | Democratic | 1938 | Incumbent re-elected. | nowrap | |- ! | Sam Rayburn | | Democratic | 1912 | Incumbent re-elected. | nowrap | |- ! | Hatton W. Sumners | | Democratic | 1914 | Incumbent re-elected. | nowrap | |- ! | Luther A. Johnson | | Democratic | 1922 | Incumbent re-elected. | nowrap | |- ! | Nat Patton | | Democratic | 1934 | Incumbent re-elected. | nowrap | |- ! | Albert Thomas | | Democratic | 1936 | Incumbent re-elected. | nowrap | |- ! | Joseph J. Mansfield | | Democratic | 1916 | Incumbent re-elected. | nowrap | |- ! | Lyndon B. Johnson | | Democratic | 1937 | Incumbent