1989 U.S. Women's Hard Court Championships – Singles

Steffi Graf was the defending champion and won in the final 6–1, 6–4 against Ann Henricksson.

Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.


 * 1)  Steffi Graf (champion)
 * 2) 🇧🇬 Manuela Maleeva (second round)
 * 3)  Natasha Zvereva (first round)
 * 4)  Claudia Kohde-Kilsch (first round)
 * 5) 🇺🇸 Patty Fendick (quarterfinals)
 * 6) 🇦🇺 Hana Mandlíková (semifinals)
 * 7) 🇺🇸 Gretchen Magers (first round)
 * 8) 🇺🇸 Terry Phelps (quarterfinals)