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.
| District | Incumbent | This race | |||
|---|---|---|---|---|---|
| Member | Party | First elected | Results | Candidates | |
| Georgia 8th | Samuel J. Tribble | Democratic | 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. |
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| 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. |
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| South Carolina 5th | David E. Finley | Democratic | 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. |
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| 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. |
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| New York 15th | Michael F. Conry | Democratic | 1908 | Incumbent died March 2, 1917, during previous congress. New member was elected April 12, 1917. Democratic gain. |
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| New Hampshire 1st | Cyrus A. Sulloway | Republican | 1894 | Incumbent died March 11, 1917. New member was elected May 29, 1917. Republican hold. |
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| Indiana 6th | Daniel W. Comstock | Republican | 1916 | Incumbent died May 19, 1917. New member was elected June 29, 1917. Republican hold. |
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| North Dakota 1st | Henry T. Helgesen | Republican | 1910 | Incumbent died April 10, 1917. New member was elected July 20, 1917. Republican hold. |
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| Pennsylvania 28th | 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. |
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| Massachusetts 6th | 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. |
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| Connecticut 4th | Ebenezer J. Hill | Republican | 1894 | Incumbent died September 27, 1917. New member was elected November 6, 1917. Republican hold. |
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