Lindsay Davenport defeated Anastasia Myskina in the final, 6–1, 6–1 to win the singles tennis title at the 2004 Southern California Open.
Justine Henin was the reigning champion, but withdrew due to a virus.
Seeds The first eight seeds received a bye into the second round.
Draw
Finals
Top half
Section 1
Section 2
Bottom half
Section 3
Section 4
External links Main and Qualifying draws