The 1818–19 United States House of Representatives elections were held on various dates in various states between April 26, 1818 and August 12, 1819. Each state set its own date for its elections to the House of Representatives before the first session of the 16th United States Congress convened on December 6, 1819. They occurred during President James Monroe's first term. Also, newly admitted Alabama elected its first representatives in September 1819, increasing the size of the House to 186 seats. This election occurred in a politically uneventful period marked by exceptionally low levels of partisan rivalry known as the Era of Good Feelings. The weak Federalist Party, with limited influence in few states, no longer effectively opposed the Democratic-Republican Party, which increased its large majority. Election summaries Illinois was admitted in 1818, adding one seat. Alabama and Maine were admitted during the 16th Congress. One new seat was added for Alabama, while Maine, splitting from Massachusetts, simply retained its Representatives. Special elections There were special elections in 1818 and 1819 to the 15th United States Congress and 16th United States Congress. Special elections are sorted by date then district. 15th Congress |- ! | Uriel Holmes | | Federalist | 1816 | | Incumbent resigned sometime in 1818.New member elected before November 1818.Democratic-Republican gain.Successor seated November 16, 1818.Successor was not a candidate for the next term, see below. | nowrap | |- ! | colspan=3 | Vacant | | Member-elect Alexander McMillan died before this Congress began.New member elected January 1, 1818.Democratic-Republican gain.Successor seated January 26, 1818.Successor later lost re-election, see below. | nowrap | |- ! | John C. Calhoun | | Democratic-Republican | 1810 | | Incumbent resigned November 3, 1817 to become U.S. Secretary of War.New member elected in January 1818.Democratic-Republican hold.Successor seated February 9, 1818.Successor later re-elected, see below. | nowrap | |- ! | Albion K. Parris | | Democratic-Republican | 1814 | | Incumbent resigned February 3, 1818.New member elected March 16, 1818.Democratic-Republican hold.Successor later re-elected, see below.Successor seated November 16, 1818. | nowrap | |- ! | John Ross | | Democratic-Republican | 1808 | | Incumbent resigned February 24, 1818 to become President Judge of Pennsylvania's 7th Judicial Circuit.New member elected March 3, 1818.Democratic-Republican hold.Successor seated March 24, 1818.Successor resigned July 6, 1818, see below. | nowrap | |- ! | Jacob Spangler | | Democratic-Republican | 1816 | | Incumbent