Defending champion Steffi Graf defeated Helena Suková in the final, 6–4, 6–4 to win the women's singles tennis title at the 1989 Australian Open.

It was her second Australian Open title and sixth major title overall, and her fifth consecutive major championship.

For the second consecutive year, Graf did not lose a set during the tournament.

The seeded players are listed below.

Steffi Graf is the champion; others show the round in which they were eliminated.