United States House of Representatives elections, 2004 (President Delay)

Elections to the United States House of Representatives for the 109th Congress were held on November 2, 2004. The House of Representatives has 435 seats. It coincided with the narrow defeat of President George W. Bush. In the 108th Congress, Republicans held 227 seats, Democrats held 205, with two Republican vacancies and one independent. As a consequence of this election, the 109th Congress began composed of 232 Republicans, 201 Democrats, one independent (who caucuses with the Democrats), and one vacancy (Democratic Representative Bob Matsui won reelection, but died on January 1, 2005, just three days before the beginning of the 109th Congress.). The Republicans thereby built up their House majority by 3 seats (gaining 8 but losing 5).

Democrats gained open seats in Colorado, South Dakota (through a 2004 special election) and New York and ousting incumbents in Georgia and Illinois. Republicans gained an open seat in Kentucky and ousted an incumbent in Indiana. A pair of seats in Louisiana swapped party control. Republicans gained several redistricted seats in Texas.

On the same date were the 2004 Presidential election, the 2004 Senate election, and many state gubernatorial elections.