1816–17 United States House of Representatives elections
House elections for the 15th U.S. Congress

The 1816–17 United States House of Representatives elections were held on various dates in various states between April 30, 1816, and August 14, 1817. Each state set its own date for its elections to the House of Representatives before the first session of the 15th United States Congress convened on December 1, 1817. The size of the House increased to 184 after Indiana and Mississippi achieved statehood.
The Democratic-Republican Party entered the election with a large majority, yet made sizable gains, helping trigger the virtually nonpartisan Era of Good Feelings under new President James Monroe, elected in 1816.
Two major events combined to help eliminate the declining Federalist Party from meaningful contention. First, the War of 1812 had concluded in 1815 with a feeling of national pride and relief, with the small American military fighting the much more powerful British forces to a draw punctuated by General Andrew Jackson's dramatic victory at the Battle of New Orleans. Federalists had opposed the risky but ultimately successful war, with some New England Federalists advocating radical measures at the Hartford Convention. Second, the 1815 eruption of Mount Tambora in present-day Indonesia, itself the most powerful in recorded history and following other major eruptions, temporarily disrupted global climate. The effects severely damaged the agricultural economy of New England, where Federalist support was strongest, causing privation, popular discontent, and mass emigration westward.
Election summaries
Mississippi was admitted as a state in 1817 during the 15th Congress, adding one seat.
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