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.<br/>New member elected January 11, 1917 to finish the current term.<br/>Democratic hold.<br/>Winner was not a candidate for the next term; see below. | nowrap |
|- | | Incumbent died December 8, 1916, after re-election.<br/>New member elected January 11, 1917 to begin the next term.<br/>Democratic hold.<br/>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.<br/>New member elected February 21, 1917 to finish the current term.<br/>Democratic hold.<br/>Winner was not a candidate for the next term; see below. | nowrap |
|- | | Incumbent died January 26, 1917, during previous congress after re-election.<br/>New member elected February 21, 1917 to begin the next term.<br/>Democratic hold.<br/>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.<br/>New member elected April 12, 1917.<br/>Democratic gain. | nowrap |
|- ! | Cyrus A. Sulloway | | Republican | 1894 | | Incumbent died March 11, 1917.<br/>New member elected May 29, 1917.<br/>Republican hold. | nowrap |
|- ! | Daniel W. Comstock | | Republican | 1916 | | Incumbent died May 19, 1917.<br/>New member was elected June 29, 1917.<br/>Republican hold. | nowrap |
|- ! | Henry T. Helgesen | | Republican | 1910 | | Incumbent died April 10, 1917.<br/>New member was elected July 20, 1917.<br/>Republican hold. | nowrap |
|- ! | Orrin D. Bleakley | | Republican | 1916 | | Incumbent resigned April 3, 1917, after being convicted and fined under the Federal Corrupt Practices Act.<br/>New member elected November 6, 1917.<br/>Democratic gain. | nowrap |
|- ! | Augustus P. Gardner | | Republican | 1902 <small>(special)</small> | | Incumbent resigned May 15, 1917, to join the U.S. Army.<br/>New member elected November 6, 1917.<br/>Republican hold. | nowrap |
|- ! | Ebenezer J. Hill | | Republican | 1894 | | Incumbent died September 27, 1917.<br/>New member was elected November 6, 1917.<br/>Republican hold. | nowrap |