The Oklahoma state elections were held on November 2, 2004. The primary election was held on July 27. The runoff primary election was held August 24.
Primary election
The candidates for the parties faced on in the primary election on July 25. If no party received more than 50% of the vote, a runoff election was held on August 22 to decide the winner.
References
Oklahoma state elections, 2004 Wikipedia(Text) CC BY-SA