McLaughlin | | Democratic | 1934 | Incumbent re-elected. | nowrap | |- ! | Karl Stefan | | Republican | 1934 | Incumbent re-elected. | nowrap | |- ! | Carl Curtis | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | Harry B. Coffee | | Democratic | 1934 | Incumbent re-elected. | nowrap | |} Nevada |- ! | James G. Scrugham | | Democratic | 1932 | Incumbent re-elected. | nowrap | |} New Hampshire |- ! | Arthur B. Jenks | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | Foster Waterman Stearns | | Republican | 1938 | Incumbent re-elected. | nowrap | |} New Jersey |- ! | Charles A. Wolverton | | Republican | 1926 | Incumbent re-elected. | nowrap | |- ! | Walter S. Jeffries | | Republican | 1938 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | William H. Sutphin | | Democratic | 1930 | Incumbent re-elected. | nowrap | |- ! | D. Lane Powers | | Republican | 1932 | Incumbent re-elected. | nowrap | |- ! | Charles A. Eaton | | Republican | 1924 | Incumbent re-elected. | nowrap | |- ! | Donald H. McLean | | Republican | 1932 | Incumbent re-elected. | nowrap | |- ! | J. Parnell Thomas | | Republican | 1936 | Incumbent re-elected. | nowrap | |- ! | George N. Seger | | Republican | 1922 | | Incumbent died August 26, 1940.New member elected.Republican hold. | nowrap | |- ! | Frank C. Osmers Jr. | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | Fred A. Hartley Jr. | | Republican | 1928 | Incumbent re-elected. | nowrap | |- ! | Albert L. Vreeland | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | Robert Kean | | Republican | 1938 | Incumbent re-elected. | nowrap | |- ! | Mary Teresa Norton | | Democratic | 1924 | Incumbent re-elected. | nowrap | |- ! | Edward J. Hart | | Democratic | 1934 | Incumbent re-elected. | nowrap | |} New Mexico |- ! | John J. Dempsey | | Democratic | 1934 | | Incumbent retired to run for U.S. senator.New member elected.Democratic hold. | nowrap |