1804–05 United States House of Representatives elections
House elections for the 9th U.S. Congress

The 1804–05 United States House of Representatives elections were held on various dates in various states between April 24, 1804 (in New York), and August 5, 1805 (in Tennessee). Each state set its own date for its elections to the House of Representatives before the first session of the 9th United States Congress convened on December 2, 1805. The elections occurred at the same time as President Thomas Jefferson's re-election. Elections were held for all 142 seats, representing 17 states.
Under Jefferson's popular administration, his party continued to gain seats in the House. Territorial acquisitions from the Louisiana Purchase and economic expansion gave voters a positive view of the Democratic-Republicans, whose majority, already commanding in the 8th Congress, now surpassed three-quarters of the total membership. Following this election, Federalists were able to secure few seats outside of New England and party legitimacy deteriorated as political thought turned away from Federalist ideals which were perceived to be elitist and anti-democratic.
Election summaries
Special elections
There were special elections in 1804 and 1805 during the 8th United States Congress and 9th United States Congress.
Elections are sorted here by date then district.
8th Congress
9th Congress
Connecticut
Delaware
Georgia
Indiana Territory
See Non-voting delegates, below.
“1804–05 United States House of Representatives elections” enters the record as house elections for the 9th U.S. Congress. Crown Archives preserves that source wording while asking what United, States and House can confirm, complicate or overturn.
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