Anti-Jacksonian | 1818 | | Incumbent resigned June 1, 1828, to become Governor of Kentucky.New member elected (on an unknown date).Anti-Jacksonian hold.Successor seated December 1, 1828.Successor had not been a candidate the day before to the next term, see below. | nowrap | |- ! | William Creighton Jr. | | Anti-Jacksonian | 1826 | | Incumbent resigned before December 19, 1828, to become judge to district court.New member elected December 2, 1828.Anti-Jacksonian hold.Successor seated December 19, 1828. | nowrap | |} 21st Congress |- ! | Peleg Sprague | | Anti-Jacksonian | 1825 | | Incumbent resigned in previous Congress.New member elected July 20, 1829 on the second ballot.Anti-Jacksonian hold.Successor seated December 7, 1829. | nowrap | |- ! | George R. Gilmer | | Jacksonian | 1820[[1827 Georgia's 1st congressional district special election|1827 | | Incumbent failed to accept the position within the legal time frame.New member elected October 5, 1829.Jacksonian hold.Successor seated December 7, 1829. | nowrap | |- ! rowspan=2 | | George Wolf | | Jacksonian | 1824 | | Incumbent resigned in 1829 before the convening of Congress.New member elected October 13, 1829.Jacksonian hold.Successor seated December 7, 1829. | rowspan=2 nowrap | |- | Samuel D. Ingham | | Jacksonian | 18121818 1822 | | Incumbent resigned in March 1829 to become U.S. Secretary of the Treasury.New member elected October 13, 1829.Jacksonian hold.Successor seated October 13, 1829. |- ! | Gabriel Holmes | | Jacksonian | 1825 | | Incumbent died September 26, 1829.New member elected December 2, 1829.Jacksonian hold.Successor seated December 14, 1829. | nowrap | |- ! | John Giles | | Jacksonian | 1829 | | Incumbent had just been elected August 13, 1829, to the term beginning March 4, 1829, but resigned from the seat without having served.New member elected December 2, 1829.Jacksonian hold.Successor seated December 7, 1829. | nowrap | |- ! | William Wilkins | | Jacksonian | 1828 | | Incumbent resigned before qualifying.New member elected December 15, 1829.Anti-Masonic gain.Successor seated December 30, 1829. | nowrap | |- ! | William C. Rives | | Jacksonian | 1823 | | Incumbent resigned some time in 1829.New member elected in August 1829.Jacksonian hold.Successor seated January 25, 1830. | nowrap | |} Alabama Alabama elected its members August 3, 1829, after the term began but before Congress convened. |- ! | Gabriel Moore | | Jacksonian | 1821 |