1989 US Open – Women's singles

Defending champion Steffi Graf defeated Martina Navratilova in the final, 3–6, 7–5, 6–1 to win the women's singles tennis title at the 1989 US Open. It was her second US Open title and eighth major singles title overall.

This marked the final professional appearance of former world No. 1 and 18-time major champion Chris Evert. She lost to Zina Garrison in the quarterfinals. It was Evert's 54th quarterfinal at a major (in her 56th major played), an Open Era record. She reached the quarterfinals in all 19 US Opens she entered, 17 times reaching the semifinals or better, and winning the title six times.

Future two-time champion Monica Seles made her US Open debut, losing to Evert in the fourth round.