| 18141816 1818 | | Incumbent retired.New member elected.Democratic-Republican hold. | nowrap | |- ! | David Walker | | Democratic-Republican | 1816 | | Incumbent died March 1, 1820.New member elected.Democratic-Republican hold.Successor also elected to finish the term. | nowrap | |- ! | George Robertson | | Democratic-Republican | 1816 | Incumbent re-elected.Incumbent resigned sometime before the start of the new Congress, leading to an August 6, 1821 special election. | nowrap | |- ! | Richard C. Anderson Jr. | | Democratic-Republican | 1816 | | Incumbent retired.New member elected.Democratic-Republican hold.Successor died October 13, 1821, leading to a November 22, 1821 special election. | nowrap | |- ! | Tunstall Quarles | | Democratic-Republican | 1816 | | Incumbent resigned June 15, 1820.New member elected.Democratic-Republican hold.Successor also elected to finish the term. | nowrap | |- ! | Benjamin Hardin | | Democratic-Republican | 18141816 1818 | Incumbent re-elected. | nowrap | |} Louisiana Louisiana elected its member July 3–5, 1820. |- ! | Thomas Butler | | Democratic-Republican | 1818 | | Incumbent lost renomination.New member elected.Democratic-Republican hold. | nowrap | |} Maine This was the first election in Maine since its separation from Massachusetts. In the previous election, Massachusetts had had 20 representatives. Seven seats (representing the -) were reassigned from Massachusetts to Maine. In addition, under the terms of the law which admitted Maine to the union, any vacancies in the 16th Congress by Representatives elected to represent Massachusetts but residing in the new states of Maine would be filled by a resident of Maine. John Holmes, who had been elected to the House for the former was elected as one of the first two senators for Maine. The vacancy was filled in a special election by Joseph Dane (Federalist). Dane was the only Representative officially considered as representing Maine in the 16th Congress. The Representatives from the 15th-20th districts were still classified as being from Massachusetts for the remainder of the 16th Congress. Maine elected its members on November 7, 1820. State law required a majority to win an election, necessitating additional ballots if a majority was not received. And, in fact, additional ballots were held on January 22, 1821, and September 10, 1821, after the term began but before the new Congress convened. |- ! | Joseph Dane | | Federalist | 1820 | Incumbent re-elected. | nowrap | |- ! |