re-elected. |- | Clifton Clagett | | Democratic-Republican | 18021804 1816 | | Incumbent lost re-election.New member elected.Democratic-Republican hold. |- | Joseph Buffum Jr. | | Democratic-Republican | 1819 | | Incumbent retired.New member elected.Democratic-Republican hold. |- | William Plumer Jr. | | Democratic-Republican | 1819 | Incumbent re-elected. |- | Arthur Livermore | | Democratic-Republican | 1816 | | Incumbent lost re-election.New member elected.Democratic-Republican hold. |} New Jersey New Jersey elected its members November 7, 1820. There were an unusually large number of candidates, 119 candidates according to one contemporary newspaper. Some candidates ran under an "Anti-Caucus" ticket. Only 1 of the 6 six incumbents would serve in the next term, as 4 retired and 1 died after re-election. |- ! rowspan=6 | | Ephraim Bateman | | Democratic-Republican | 1814 | Incumbent re-elected. | rowspan=6 nowrap | |- | John Linn | | Democratic-Republican | 1816 | Incumbent re-elected but died January 5, 1821, leading to an October 8, 1821 special election. |- | Bernard Smith | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Democratic-Republican hold. |- | Henry Southard | | Democratic-Republican | 1814 | | Incumbent retired.New member elected.Democratic-Republican hold. |- | Joseph Bloomfield | | Democratic-Republican | 1816 | | Incumbent retired.New member elected.Democratic-Republican hold. |- | Charles Kinsey | | Democratic-Republican | 18161818 1820 | | Incumbent retired.New member elected.Democratic-Republican hold. |} New York New York elected its members April 24–26, 1821, after the term began but before the new Congress convened. The , previously a plural district with two seats, was divided into two single-member districts for the 17th Congress, the 21st and . The Democratic-Republican party in New York was divided between "Bucktails" and "Clintonians". The Clintonians ran on a joint ticket with the remaining Federalists. In a few cases, marked as "Clintonian/Federalist" below, it is unclear whether a candidate on the joint ticket was Democratic-Republican or Federalist. Only five of the twenty-seven incumbents were re-elected to the next term. Sixteen incumbents retired and five lost re-election. Despite this high turnover of membership, there was only a one-seat net gain for the Federalists. |- ! rowspan=2 | | Silas Wood | | Federalist | 1818 | Incumbent re-elected. | rowspan=2 nowrap | |- | James Guyon Jr. | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Democratic-Republican hold. |- ! rowspan=2 | | Henry Meigs | | Democratic-Republican |