1990 Australian Open – Women's singles

Two-time defending champion Steffi Graf defeated Mary Joe Fernández in the final, 6–3, 6–4 to win the women's singles tennis title at the 1990 Australian Open. It was her third Australian Open title and ninth major title overall.

Seeds
The seeded players are listed below. Steffi Graf is the champion; others show the round in which they were eliminated.


 * 1) 🇩🇪 Steffi Graf (champion)
 * 2) 🇦🇷 Gabriela Sabatini (third round)
 * 3) 🇺🇸 Zina Garrison (quarterfinals)
 * 4)  Helena Suková (semifinals)
 * 5)  Jana Novotná (third round)
 * 6) 🇺🇸 Mary Joe Fernández (finalist)
 * 7) 🇦🇺 Hana Mandlíková (third round)
 * 8) 🇨🇦 Helen Kelesi (third round)
 * 9) 🇧🇬 Katerina Maleeva (quarterfinals)
 * 10)  Natalia Zvereva (second round)
 * 11) 🇺🇸 Pam Shriver (third round)
 * 12)  Larisa Savchenko-Neiland (first round)
 * 13) 🇮🇹 Raffaella Reggi (fourth round)
 * 14)  Rosalyn Fairbank (third round)
 * 15) 🇺🇸 Gigi Fernández (fourth round)
 * 16) 🇦🇹 Barbara Paulus (fourth round)

Key

 * Q = Qualifier
 * WC = Wild card
 * LL = Lucky loser
 * r = Retired