List of elections
Elections are listed by date and district.
| District | Incumbent | This race | |||
|---|---|---|---|---|---|
| Member | Party | First elected | Results | Candidates | |
| Alaska at-large | Nick Begich | Democratic | 1970 | Incumbent lost in a plane crash and declared dead. New member elected March 6, 1973. Republican gain. |
|
| Louisiana 2 | Hale Boggs | Democratic | 1940 | Incumbent lost in a plane crash and declared dead January 3, 1973. New member elected March 20, 1973. Democratic hold. |
|
| Maryland 1 | William Mills | Republican | 1971 (special) | Incumbent died May 24, 1973. New member elected August 21, 1973. Republican hold. |
|
| Illinois 7 | George W. Collins | Democratic | 1970 (special) | Incumbent member-elect died December 8, 1972, during the previous congress. New member elected June 5, 1973. Democratic hold. |
|
