There were eight special elections to the United States House of Representatives in 1917, during the 64th United States Congress and 65th United States Congress.
|-! rowspan=2 | | rowspan=2 | Samuel J. Tribble| rowspan=2 | Democratic| rowspan=2 | 1910| | Incumbent died December 8, 1916, after re-election.
New member elected January 11, 1917 to finish the current term.
Democratic hold.
Winner was not a candidate for the next term, see below.| nowrap |
|-| | Incumbent died December 8, 1916, after re-election.
New member elected January 11, 1917 to begin the next term.
Democratic hold.
Winner was not a candidate to finish the previous term, see above.| nowrap |
|-! rowspan=2 | | rowspan=2 | David E. Finley| rowspan=2 | Democratic| rowspan=2 | 1898| | Incumbent died January 26, 1917, after re-election.
New member elected February 21, 1917 to finish the current term.
Democratic hold.
Winner was not a candidate for the next term, see below.| nowrap |
|-| | Incumbent died January 26, 1917, during previous congress after re-election.
New member elected February 21, 1917 to begin the next term.
Democratic hold.
Winner was not a candidate to finish the previous term, see above.| nowrap |
|-! | Michael F. Conry| | Democratic| 1908| | Incumbent died March 2, 1917, during previous congress.
New member was elected April 12, 1917.
Democratic gain.| nowrap |
|-! | Cyrus A. Sulloway| | Republican| 1894| | Incumbent died March 11, 1917.
New member was elected May 29, 1917.
Republican hold.| nowrap |
|-! | Daniel W. Comstock| | Republican| 1916| | Incumbent died May 19, 1917.
New member was elected June 29, 1917.
Republican hold.| nowrap |
|-! | Henry T. Helgesen| | Republican| 1910| | Incumbent died April 10, 1917.
New member was elected July 20, 1917.
Republican hold.| nowrap |
|-! | Orrin D. Bleakley| | Republican| 1916| | Incumbent resigned April 3, 1917, after being convicted and fined under the Federal Corrupt Practices Act.
New member was elected November 6, 1917.
Democratic gain.| nowrap |
|-! | Augustus P. Gardner| | Republican| 1902 (Special)| | Incumbent resigned May 15, 1917, to join the U.S. Army.
New member was elected November 6, 1917.
Republican hold.| nowrap |
|-! | Ebenezer J. Hill | | Republican| 1894| | Incumbent died September 27, 1917.
New member was elected November 6, 1917.
Republican hold.| nowrap |
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