Nathaniel Macon Democratic-Republican Nathaniel Macon Democratic-Republican 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).

The elections occurred at the same time as President Thomas Jefferson's re-election.

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.

The Federalist ticket was announced only a week before the election, with no active campaigning.