special election to finish the term. | nowrap | |- ! | Robert Philson | | Democratic-Republican | 1818 | | Incumbent lost re-election.New member elected.Democratic-Republican hold. | nowrap | |- ! | William P. Maclay | | Democratic-Republican | 1816 | | Incumbent lost re-election.New member elected.Democratic-Republican hold. | nowrap | |- ! rowspan=2 | | George Denison | | Democratic-Republican | 1818 | Incumbent re-elected. | rowspan=2 nowrap | |- | John Murray | | Democratic-Republican | 1817 | | Incumbent retired.New member elected.Federalist gain.Incumbent resigned July 20, 1821, leading to an October 9, 1821 special election. |- ! | David Marchand | | Democratic-Republican | 1816 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | Thomas Patterson | | Democratic-Republican | 1816 | Incumbent re-elected. | nowrap | |- ! | Christian Tarr | | Democratic-Republican | 1816 | | Incumbent lost re-election.New member elected.Democratic-Republican hold. | nowrap | |- ! | Henry Baldwin | | Democratic-Republican | 1816 | Incumbent re-elected. | nowrap | |- ! | Robert Moore | | Democratic-Republican | 1816 | | Incumbent lost re-election.New member elected.Democratic-Republican hold. | nowrap | |} Rhode Island Rhode Island elected its members August 29, 1820. |- ! rowspan=2 | | Samuel Eddy | | Democratic-Republican | 1818 | Incumbent re-elected. | rowspan=2 nowrap | |- | Nathaniel Hazard | | Democratic-Republican | 1818 | | Incumbent lost re-election.New member elected.Democratic-Republican hold.Incumbent died December 17, 1820, and seat remained vacant until the end of term. |} South Carolina South Carolina elected its members October 9–10, 1820. |- ! | Charles Pinckney | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | William Lowndes | | Democratic-Republican | 1810 | Incumbent re-elected. | nowrap | |- ! | James Ervin | | Democratic-Republican | 1816 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | James Overstreet | | Democratic-Republican | 1818 | Incumbent re-elected. | nowrap | |- ! | Starling Tucker | | Democratic-Republican | 1816 | Incumbent re-elected. | nowrap | |- ! | Eldred Simkins | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | Elias Earle | | Democratic-Republican | 18041814 1816 | | Incumbent lost re-election.New member elected.Democratic-Republican hold. | nowrap | |- ! | John McCreary |