elsewhere on Wikipedia used here. |- ! | Jonathan Mason | | Federalist | 1817 | | Incumbent resigned May 15, 1820, to pursue his law practice.New member elected.Democratic-Republican gain.Successor also elected the same day to finish the term. | nowrap | |- ! | Nathaniel Silsbee | | Democratic-Republican | 1816 | | Incumbent retired.New member elected late on the third ballot after the term began but before the Congress convened.Democratic-Republican hold. | nowrap | |- ! | Jeremiah Nelson | | Federalist | 18041806 1814 | Incumbent re-elected. | nowrap | |- ! | Timothy Fuller | | Democratic-Republican | 1816 | Incumbent re-elected. | nowrap | |- ! | Samuel Lathrop | | Federalist | 1819 | Incumbent re-elected. | nowrap | |- ! | Samuel C. Allen | | Federalist | 1816 | Incumbent re-elected. | nowrap | |- ! | Henry Shaw | | Democratic-Republican | 1816 | | Incumbent retired.New member elected.Federalist gain. | nowrap | |- ! | Zabdiel Sampson | | Democratic-Republican | 1816 | | Incumbent resigned July 26, 1820.New member elected.Democratic-Republican hold. | nowrap | |- ! | Walter Folger Jr. | | Democratic-Republican | 1816 | | Incumbent lost re-election.New member elected.Federalist gain. | nowrap | |- ! | Marcus Morton | | Democratic-Republican | 1816 | | Incumbent lost re-election.New member elected.Federalist gain | nowrap | |- ! | Benjamin Adams | | Federalist | 1816 | | Incumbent lost re-election.New member elected.Democratic-Republican gain. | nowrap | |- ! | Jonas Kendall | | Federalist | 1818 | | Incumbent lost re-election.New member elected.Federalist hold. | nowrap | |- ! | William Eustis | | Democratic-Republican | 18001804 1820 | Incumbent re-elected. | nowrap | |} Michigan Territory See Non-voting delegates, below. Mississippi Mississippi elected its member August 7–8, 1820. |- ! | Christopher Rankin | | Democratic-Republican | 1819 | Incumbent re-elected. | nowrap | |} Missouri Missouri was admitted to the union on August 10, 1821, but elections had been held August 28, 1820. |- ! | colspan=3 | None (District created) | | New seat.Territorial delegate re-elected as new member.Democratic-Republican gain. | nowrap | |} New Hampshire New Hampshire elected its members August 18, 1820. |- ! rowspan=6 | | Josiah Butler | | Democratic-Republican | 1816 | Incumbent re-elected. | rowspan=6 nowrap | |- | Nathaniel Upham | | Democratic-Republican | 1816 | Incumbent