1818 | | Incumbent retired.New member elected.Democratic-Republican hold. | rowspan=2 nowrap | |- | Peter H. Wendover | | Democratic-Republican | 1814 | | Incumbent retired.New member elected.Democratic-Republican hold. |- ! | Caleb Tompkins | | Democratic-Republican | 1816 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | Randall S. Street | | Federalist | 1818 | | Incumbent retired.New member elected.Democratic-Republican gain. | nowrap | |- ! | James Strong | | Federalist | 1818 | | Incumbent retired.New member elected.Federalist hold. | nowrap | |- ! | Walter Case | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Democratic-Republican hold.Successor died September 7, 1821, before the Congress convened, leading to a November 6–8, 1821 special election. | nowrap | |- ! | Jacob H. De Witt | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Federalist gain. | nowrap | |- ! | Robert Clark | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | Solomon Van Rensselaer | | Federalist | 1818 | Incumbent re-elected. | nowrap | |- ! | John D. Dickinson | | Federalist | 1818 | Incumbent re-elected. | nowrap | |- ! | John W. Taylor | | Democratic-Republican | 1812 | Incumbent re-elected. | nowrap | |- ! rowspan=2 | | Nathaniel Pitcher | | Democratic-Republican | 1818 | Incumbent re-elected. | rowspan=2 nowrap | |- | Ezra C. Gross | | Democratic-Republican | 1818 | | Incumbent lost re-election.New member elected.Democratic-Republican hold. |- ! | Harmanus Peek | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | John Fay | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! rowspan=2 | | Robert Monell | | Democratic-Republican | 1818 | | Incumbent lost re-election.New member elected.Democratic-Republican hold. | rowspan=2 nowrap | |- | Joseph S. Lyman | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Democratic-Republican hold. |- ! | Henry R. Storrs | | Federalist | 1816 | | Incumbent retired.New member elected.Federalist hold. | nowrap | |- ! | Aaron Hackley Jr. | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | William D. Ford | | Democratic-Republican | 1818 | | Incumbent retired.New member elected.Federalist gain. | nowrap |