2004 Vancouver Women's Open – Singles

This was the first WTA edition of the tournament; the previous editions were ITF events.

Anna-Lena Grönefeld was the defending champion from 2003, but lost in the second round to Sessil Karatantcheva.

Nicole Vaidišová won the title, defeating Laura Granville in the final. At 15 years and 3 months of age, Vaidišová became the 6th youngest woman to win a Pro-level title, and the youngest since 1997.

Seeds
• # 🇫🇷 Marion Bartoli (second round)

• # 🇻🇪 Milagros Sequera (quarterfinals)

• # 🇷🇺 Alina Jidkova (semifinals)

• # 🇺🇸 Laura Granville (finals, runner-up)

• # 🇺🇸 Marissa Irvin (second round)

• # 🇮🇹 Rita Grande (quarterfinals)

• # 🇩🇪 Anna-Lena Grönefeld (second round)

• # 🇺🇸 Lindsay Lee-Waters (quarterfinals)

Seeds
• # 🇸🇰 Jarmila Gajdošová (first round)

• # Rosana de los Ríos (first round)

• # 🇨🇿 Nicole Vaidišová (qualified)

• # 🇧🇷 Maria Fernanda Alves (second round)

• # Lana Popadić (first round)

• # 🇨🇳 Xie Yan-ze (second round)

• # 🇩🇪 Sandra Klösel (first round)

• # N/A

Qualifiers
• # 🇯🇵 Seiko Okamoto

• # 🇦🇷 María Vanina García Sokol

• # 🇨🇿 Nicole Vaidišová

• # 🇧🇬 Sessil Karatantcheva