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.

Quick Facts All 142 seats in the United States House of Representatives 72 seats needed for a majority, Majority party ...

1804–05 United States House of Representatives elections

← 1802 & 1803 April 24, 1804 – August 5, 1805 1806 & 1807 →
All 142 seats in the United States House of Representatives 72 seats needed for a majority
Majority party Minority party   Leader Nathaniel Macon John Cotton Smith Party Democratic-Republican Federalist Leader's seat North Carolina 6th Connecticut at-large Last election 103 seats 39 seats Seats won 114 28 Seat change 11 11
'Results:      Federalist hold      Federalist gain      Democratic-Republican hold      Democratic-Republican gain      Dissident Republican Gain      Undistricted
Speaker before election Nathaniel Macon Democratic-Republican Elected Speaker Nathaniel Macon Democratic-Republican

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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 perceived to be elitist and anti-democratic.

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.

See Non-voting delegates, below.

The majority requirement was met in all 17 districts in the 1804 elections.

See Non-voting delegates, below.

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

New York held elections for the 9th Congress on April 24–26, 1804. For this year and the next election year, the 2nd and 3rd districts had combined returns, effectively a plural district with 2 seats, though still numbered as separate districts. At the time, District 2 consisted of only part of New York County, while District 3 consisted of the remainder of New York County plus Kings and Richmond Counties. By consolidating the two, it ensured that New York County would be combined into a single district.

Beginning with the 9th Congress, Tennessee was divided into 3 districts.

Vermont required a majority for election, which frequently mandated runoff elections. The 2nd, and 3rd districts both required second elections in this election cycle, and districts both required second elections in this election cyclethe 3rd district required a third election.

There were three territories with non-voting delegates in the 9th Congress, one of which (the Orleans Territory) did not send its first representative until 1806. The delegates were elected by the territorial legislatures, votes here are the number of members of the territorial legislatures voting for each candidate.

In the Mississippi Territory, the territorial legislature was locked. The first vote given above was on the 7th ballot, after which point the territorial legislature adjourned, the second vote was at a later session of the territorial legislature.

• 1804 United States elections
  • List of United States House of Representatives elections (1789–1822)
  • 1804–05 United States Senate elections
  • 1804 United States presidential election
• 9th United States Congress