An election was held on November 2, 2004, to elect all 100 members to Montana's House of Representatives. The election coincided with elections for other offices, including U.S. President, U.S. House of Representatives, Governor and State Senate. The primary election was held on June 8, 2004.
A net loss of three seats by the Republicans resulted in the House being tied at 50 seats each. Democrats regained control of the House after 12 years by virtue of Governor Brian Schweitzer being a Democrat.
Statewide results of the 2004 Montana House of Representatives election:
Results of the 2004 Montana House of Representatives election by district: