There were elections in 1943 to the United States House of Representatives:
|-! | colspan=3 | Vacant| | Incumbent Philip A. Bennett (R) died in previous Congress.
New member elected January 12, 1943.
Republican hold.| nowrap |
|-! | Harry Lane Englebright| | 1926 (special)| | Incumbent died May 13, 1943.
New member elected August 31, 1943.
Democratic gain.| nowrap |
|-! | Ulysses S. Guyer| | 1924 (special)
1924 (retired)
1926| | Incumbent died June 5, 1943.
New member elected September 14, 1943.
Republican hold.| nowrap |
|-! | Francis D. Culkin| | 1928 (special)| | Incumbent died August 4, 1943.
New member elected November 2, 1943.
Republican hold.| nowrap |
|-! | James E. Van Zandt| | 1938| | Incumbent resigned September 24, 1943, after being called to active duty in the US Armed Forces.
New member elected November 2, 1943.
Republican hold.| nowrap |
|-! | Edward W. Creal| | 1935 (special)| | Incumbent died October 13, 1943.
New member elected November 30, 1943.
Republican gain.| nowrap | |}