There were at least four special elections to the United States House of Representatives in 1965, during 89th United States Congress.
Elections are listed by date and district.
__TOC__
|-! | Albert Watson| | Democratic| 1962| | Incumbent resigned February 1, 1965, after being stripped of seniority by the House Democratic Caucus for supporting Republican presidential candidate Barry Goldwater.
Incumbent re-elected June 15, 1965 as a Republican.
Republican gain.| nowrap |
|-! | Ashton Thompson| | Democratic| 1952| | Incumbent died July 1, 1965.
New member elected October 2, 1965.[1]
Democratic hold.| nowrap |
|-! | Clarence J. Brown| | Republican| 1938| | Incumbent died August 23, 1965.
New member elected November 2, 1965.
Republican hold.| nowrap |
|-! | James Roosevelt| | Democratic| 1954| | Incumbent resigned to run for Mayor of Los Angeles.
New member elected December 15, 1965.
Democratic hold.| nowrap |
|}