Defending champion Martina Navratilova defeated Chris Evert in a rematch of the previous year's final, 4–6, 6–4, 6–4 to win the women's singles tennis title at the 1984 US Open. The victory marked Navratilova's sixth consecutive major singles title, tying Margaret Court and Maureen Connolly's achievement. She also became the first player in history to win the Surface Slam, having won the preceding French Open and Wimbledon. It was her second US Open singles title and eleventh major singles title overall. This marked the first major appearance for future world No. 3 and 1990 champion Gabriela Sabatini; she was defeated in the third round by Helena Suková.

Seeds

• # 🇺🇸 Martina Navratilova (champion) • # 🇺🇸 Chris Evert (final) • # Hana Mandlíková (quarterfinals) • # 🇺🇸 Pam Shriver (quarterfinals) • # 🇺🇸 Kathy Jordan (second round) • # 🇧🇬 Manuela Maleeva (first round) • # 🇺🇸 Zina Garrison (third round) • # Claudia Kohde-Kilsch (fourth round) • # 🇺🇸 Lisa Bonder (fourth round) • # 🇬🇧 Jo Durie (first round) • # 🇺🇸 Kathy Horvath (first round) • # 🇺🇸 Bonnie Gadusek (fourth round) • # 🇦🇺 Wendy Turnbull (semifinals) • # 🇨🇦 Carling Bassett (semifinals) • # 🇺🇸 Barbara Potter (fourth round) • # 🇭🇺 Andrea Temesvári (third round)

Qualifying

Draw

Finals

Top half

Section 1

Section 2

Section 3

Section 4

Bottom half

Section 5

Section 6

Section 7

Section 8