Amélie Mauresmo defeated Elena Likhovtseva in the final, 6–1, 6–0 to win the women's singles tennis title at the 2004 Canadian Open.
Justine Henin-Hardenne was the reigning champion, but chose not to participate that year.
Seeds The top eight seeds received a bye into the second round.
Serena Williams (withdrew due to a left knee inflammation) Amélie Mauresmo (champion) Anastasia Myskina (semifinals) Elena Dementieva (second round) Jennifer Capriati (quarterfinals) Maria Sharapova (third round) Ai Sugiyama (third round) Nadia Petrova (second round) Paola Suárez (third round) Vera Zvonareva (semifinals) Francesca Schiavone (third round) Karolina Šprem (quarterfinals) Magdalena Maleeva (quarterfinals) Elena Bovina (third round) Chanda Rubin (third round) Fabiola Zuluaga (second round) Mary Pierce (third round)
Draw
Finals
Top half
Section 1
Section 2
Bottom half
Section 3
Section 4
External links Draw and Qualifying Draw