Democratic | 1938 | Incumbent re-elected. | nowrap | |- ! | Daniel Ellison | | Republican | 1942 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Lansdale Sasscer | | Democratic | 1939 | Incumbent re-elected. | nowrap | |- ! | James Glenn Beall | | Republican | 1942 | Incumbent re-elected. | nowrap | |} Massachusetts |- ! | Allen T. Treadway | | Republican | 1912 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | Charles R. Clason | | Republican | 1936 | Incumbent re-elected. | nowrap | |- ! | Philip J. Philbin | | Democratic | 1942 | Incumbent re-elected. | nowrap | |- ! | Pehr G. Holmes | | Republican | 1930 | Incumbent re-elected. | nowrap | |- ! | Edith Nourse Rogers | | Republican | 1925 | Incumbent re-elected. | nowrap | |- ! | George J. Bates | | Republican | 1936 | Incumbent re-elected. | nowrap | |- ! | Thomas J. Lane | | Democratic | 1941 | Incumbent re-elected. | nowrap | |- ! | Angier Goodwin | | Republican | 1942 | Incumbent re-elected. | nowrap | |- ! | Charles L. Gifford | | Republican | 1922 | Incumbent re-elected. | nowrap | |- ! | Christian Herter | | Republican | 1942 | Incumbent re-elected. | nowrap | |- ! | James Michael Curley | | Democratic | 1942 | Incumbent re-elected. | nowrap | |- ! | John W. McCormack | | Democratic | 1928 | Incumbent re-elected. | nowrap | |- ! | Richard B. Wigglesworth | | Republican | 1928 | Incumbent re-elected. | nowrap | |- ! | Joseph W. Martin Jr. | | Republican | 1924 | Incumbent re-elected. | nowrap | |} Michigan |- ! | George G. Sadowski | | Democratic | 1942 | Incumbent re-elected. | nowrap | |- ! | Earl C. Michener | | Republican | 1934 | Incumbent re-elected. | nowrap | |- ! | Paul W. Shafer | | Republican | 1936 | Incumbent re-elected. | nowrap | |- ! | Clare E. Hoffman | | Republican | 1934 | Incumbent re-elected. | nowrap | |- ! | Bartel J. Jonkman | | Republican | 1940 | Incumbent re-elected. | nowrap | |- ! | William W. Blackney |