There were several special elections to the United States House of Representatives in 1945 during the 79th Congress.
|-| | Dave E. Satterfield Jr.| | Democratic| 1937 | | Incumbent resigned.
New member elected March 6, 1945.
Democratic hold.| nowrap |
|-| | James F. O'Connor| | Republican| 1936| | Incumbent died January 15, 1945.
New member elected June 5, 1945.
Republican hold.| nowrap |
|-| | James V. Heidinger| | Republican| 1940| | Incumbent died in office.
New member elected November 6, 1945.
Republican hold.|
|}