1816 | | Incumbent retired.New member elected.Democratic-Republican gain. |- | Timothy Pitkin | | Federalist | 1805 | | Incumbent retired.New member elected.Democratic-Republican gain. |- | Nathaniel Terry | | Federalist | 1817 | | Incumbent retired.New member elected.Democratic-Republican gain. |- | Thomas Scott Williams | | Federalist | 1816 | | Incumbent retired.New member elected.Democratic-Republican gain. |- | Uriel Holmes | | Federalist | 1816 | | Incumbent resigned sometime in 1818.New member elected.Democratic-Republican gain.Successor was not elected to finish the term. |} Delaware Delaware elected its members October 5, 1818. |- ! rowspan=2 | | Louis McLane | | Federalist | 1816 | Incumbent re-elected. | rowspan=2 nowrap | |- | Willard Hall | | Democratic-Republican | 1816 | Incumbent re-elected. |} Georgia Georgia elected its members October 5, 1818. |- ! rowspan=6 | | William Terrell | | Democratic-Republican | 1816 | Incumbent re-elected. | rowspan=6 nowrap | |- | Joel Crawford | | Democratic-Republican | 1816 | Incumbent re-elected. |- | Joel Abbot | | Democratic-Republican | 1816 | Incumbent re-elected. |- | Zadock Cook | | Democratic-Republican | 1816 | | Incumbent retired.New member elected.Democratic-Republican hold. |- | John Forsyth | | Democratic-Republican | 1812 | Incumbent re-elected but declined the seat and resigned November 23, 1818, having been elected U.S. Senator, leading to a special election. |- | Thomas W. Cobb | | Democratic-Republican | 1816 | Incumbent re-elected. |} Illinois Illinois elected its member August 2, 1819, after the new congress began but before the first session convened. The incumbent had just been elected to the new seat in late 1818. 15th Congress |- ! | colspan=3 | None (District created) | | Illinois was admitted December 3, 1818.New member elected in 1818.Democratic-Republican gain.New member seated December 4, 1818 to finish the term ending March 3, 1819.The next year, the new member lost re-election, see below. | nowrap | |} 16th Congress |- ! | John McLean | | Democratic-Republican | 1818 | | Incumbent lost re-election.New member elected.Democratic-Republican hold. | nowrap | |} Indiana Indiana re-elected its member August 3, 1818. |- ! | William Hendricks | | Democratic-Republican | 1816 | Incumbent re-elected. | nowrap | |} Kentucky Kentucky elected its members August 3, 1818. |- ! | David Trimble | | Democratic-Republican | 1816 | Incumbent re-elected. | nowrap | |- ! | Henry Clay | | Democratic-Republican | 18101814