Samuel A. Foot | | Anti-Jacksonian | 1833 | data-sort-value="January 1, 1834" | Incumbent resigned May 9, 1834 to become Governor of Connecticut.New member elected in 1834 and seated December 1, 1834.Anti-Jacksonian hold.Successor later lost re-election, see below. |- ! | John Davis | | Anti-Jacksonian | 1825 | data-sort-value="January 14, 1834" | Incumbent resigned January 14, 1834 to become Governor of Massachusetts.New member elected February 17, 1834.Anti-Jacksonian hold.Successor seated March 5, 1834 and later re-elected, see below. | nowrap | |- ! | Littleton Dennis | | Anti-Jacksonian | 1833 | data-sort-value="May 29, 1834" | Incumbent died April 14, 1834.New member elected May 29, 1834.Anti-Jacksonian hold.Successor seated June 9, 1834 and later re-elected, see below. | nowrap | |- ! | James Blair | | Jacksonian | 1828 | data-sort-value="June 3, 1834" | Incumbent died April 1, 1834.New member elected June 3, 1834.Jacksonian hold.Successor later re-elected, see below.Successor seated December 8, 1834. | nowrap | |- ! | colspan=3 | Vacant | data-sort-value="August 4, 1834" | 1833 election of Thomas Patrick Moore declared invalid.House ordered new election.New member elected August 4, 1834.Anti-Jacksonian gain.Successor seated December 1, 1834 and was not a candidate for the next term, see below. | nowrap | |- ! | Humphrey H. Leavitt | | Jacksonian | 1830 | data-sort-value="October 14, 1834" | Incumbent resigned July 10, 1834 to become U.S. District Judge.New member elected October 14, 1834.Jacksonian hold.Successor seated December 1, 1834 and also elected the same day to the next term, see below. | nowrap | |- ! rowspan=2 | | Dudley Selden | | Jacksonian | 1832 | | Incumbent resigned July 2, 1834.New member elected November 3, 1834.Jacksonian hold.Successor seated December 1, 1834. | rowspan=2 nowrap | |- | Cornelius Lawrence | | Jacksonian | 1832 | | Incumbent resigned May 14, 1834 to become Mayor of New York City.New member elected November 3, 1834.Jacksonian hold.Successor seated December 1, 1834. |- ! | Robert Todd Lytle | | Jacksonian | 1832 | data-sort-value="November 8, 1834" | Incumbent resigned March 10, 1834.Incumbent re-elected November 8, 1834, having already lost re-election, see below.Jacksonian hold.Incumbent re-seated December 27, 1834. | nowrap | |- ! | Benjamin F. Deming | | Anti-Masonic | 1833 | data-sort-value="November 10, 1834" | Incumbent died July 11, 1834.Incumbent re-elected November 10, 1834.Anti-Masonic hold.Successor seated December 1, 1834 and also elected the same day to the next term, see below.