Incumbent re-elected. | nowrap | |- ! | John Boyle | | Democratic-Republican | 1803 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | John Rowan | | Democratic-Republican | 1806 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | Richard M. Johnson | | Democratic-Republican | 1806 | Incumbent re-elected. | nowrap | |- ! | Benjamin Howard | | Democratic-Republican | 1806 | Incumbent re-elected. | nowrap | |- ! | Joseph Desha | | Democratic-Republican | 1806 | Incumbent re-elected. | nowrap | |} Maryland |- ! | John Campbell | | Federalist | 1801 | Incumbent re-elected. | nowrap | |- ! | Archibald Van Horne | | Democratic-Republican | 1806 | Incumbent re-elected. | nowrap | |- ! | Philip Barton Key | | Federalist | 1806 | Incumbent re-elected. | nowrap | |- ! | Roger Nelson | | Democratic-Republican | 1804 | Incumbent re-elected. | nowrap | |- ! rowspan=2 | | Nicholas R. Moore | | Democratic-Republican | 1803 | Incumbent re-elected. | rowspan=2 nowrap | |- | William McCreery | | Democratic-Republican | 1803 | | Incumbent retired.New member elected.Democratic-Republican hold. |- ! | John Montgomery | | Democratic-Republican | 1806 | Incumbent re-elected. | nowrap | |- ! | Edward Lloyd | | Democratic-Republican | 1806 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | Charles Goldsborough | | Federalist | 1804 | Incumbent re-elected. | nowrap | |} Massachusetts |- ! | Josiah Quincy | | Federalist | 1804 | Incumbent re-elected. | nowrap | |- ! | Joseph Story | | Democratic-Republican | 1808 | | Incumbent retired.New member elected.Federalist gain. | nowrap | |- ! | Edward St. Loe Livermore | | Federalist | 1806 | Incumbent re-elected. | nowrap | |- ! | Joseph Bradley Varnum | | Democratic-Republican | 1794 | Incumbent re-elected. | nowrap | |- ! | William Ely | | Federalist | 1804 | Incumbent re-elected. | nowrap | |- ! | Samuel Taggart | | Federalist | 1803 | Incumbent re-elected. | nowrap | |- ! | Joseph Barker | | Democratic-Republican | 1804 | | Incumbent retired.Two ballots were held, but the second was invalidated.New member elected.Democratic-Republican hold. | nowrap | |- ! | Isaiah L. Green | | Democratic-Republican | 1804 | | Incumbent retired.New member elected.Democratic-Republican