There were four elections to the United States House of Representatives in 1959, all during the 86th United States Congress. Three of them were special elections to fill vacancies, and the fourth was to fill a seat for the new state of Hawaii. There were no special elections to the 85th Congress in 1959.
Elections are listed by date and district.
| District | Incumbent | This race | |||
|---|---|---|---|---|---|
| Member | Party | First elected | Results | Candidates | |
| Missouri 4 | George H. Christopher | Democratic | 1948 | Incumbent died January 23, 1959. New member elected March 3, 1959. Democratic hold. |
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| New York 43 | Daniel A. Reed | Republican | 1918 | Incumbent died February 19, 1959 New member elected May 26, 1959. Republican hold. |
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| Iowa 4 | Steven V. Carter | Democratic | 1958 | Incumbent died November 4, 1959 New member elected December 15, 1959. Republican gain. |
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In 1959, Hawaii became a state and elected one new member of the House, Democrat Daniel Inouye.
| District | Incumbent | This race | |||
|---|---|---|---|---|---|
| Member | Party | First elected | Results | Candidates | |
| Hawaii at-large | New state | New seat. New member elected August 21, 1959. Democratic gain. |
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