See main article: 1985 US Open (tennis).
Hana Mandlíková defeated the two-time defending champion Martina Navratilova in the final, 7–6(7–3), 1–6, 7–6(7–2) to win the women's singles tennis title at the 1985 US Open. It was her third major singles title.
See main article: 1985 US Open – Women's singles qualifying.