The 1806–07 United States House of Representatives elections were held on various dates in various states between April 29, 1806 (in New York) and August 4, 1807 (in Tennessee). Each state set its own date for its elections to the House of Representatives before the first session of the 10th United States Congress convened on October 26, 1807. They occurred during Thomas Jefferson's second term. Elections were held for all 142 seats, representing 17 states. The Democratic-Republicans continued to build on their huge supermajority. They were actually able to take over two more seats than they had in the previous Congress, which they controlled by a margin of better than three to one. Commitment to agrarian policy allowed the Democratic-Republicans to dominate rural districts, which represented the bulk of the nation. On the other hand, supporters of the Federalists, even in their traditional base of support in the urban centers of coastal New England, continued to lament the ineffectiveness of their party and its lack of electoral appeal. Election summaries Special elections There were special elections in 1806 and 1807 during the 9th United States Congress and 10th United States Congress. Elections are sorted here by date then district. 9th Congress |- ! | Nathaniel Alexander | | Democratic-Republican | 1803 | | Incumbent resigned November 1805 after being elected Governor of North Carolina.New member elected.Democratic-Republican hold.Successor seated February 24, 1806.Successor later elected to the next term, see below. | nowrap | |- ! | John Cotton Smith | | Federalist | 1800 | | Incumbent resigned sometime in August 1806.New member elected September 15, 1806.Federalist hold.Successor seated December 1, 1806.Successor declined to run for the next term, on a ballot the same day, see below. | nowrap | |- ! | Joseph Bryan | | Democratic-Republican | 1803 | | Incumbent resigned sometime in 1806.New member elected September 15, 1806.Democratic-Republican hold.Successor seated September 1, 1806.Successor was later elected to the next term, see below. | nowrap | |- ! | Thomas Spalding | | Democratic-Republican | 1805 | | Incumbent resigned sometime in 1806.New member elected before December 6, 1806.Democratic-Republican hold.Successor seated January 26, 1807.Successor had already been elected to the next term, see below. | nowrap | |- ! | Joseph H. Nicholson | | Democratic-Republican | 1798 | | Incumbent resigned March 1, 1806.New member elected October 4, 1806.Democratic-Republican hold.Successor seated December 3, 1806.Successor also elected to