2005 Medibank International – Women's singles

Justine Henin-Hardenne was the defending champion, but did not compete this year.

Alicia Molik won the title by defeating Samantha Stosur 6–7(5–7), 6–4, 7–5 in the final. It was the 1st title for Molik in this season and the 5th title in her career.

Seeds
The first four seeds received a bye into the second round. • # 🇺🇸 Lindsay Davenport (quarterfinals, withdrew due to a bronchitis)

• # 🇷🇺 Anastasia Myskina (second round)

• # 🇷🇺 Elena Dementieva (semifinals, withdrew due to a heat illness)

• # 🇷🇺 Vera Zvonareva (second round)

• # 🇷🇺 Nadia Petrova (quarterfinals)

• # 🇦🇺 Alicia Molik (champion)

• # Patty Schnyder (quarterfinals)

• # 🇯🇵 Ai Sugiyama (first round)