See main article: 1980 US Open (tennis).
Chris Evert-Lloyd defeated Hana Mandlíková in the final, 5–7, 6–1, 6–1 to win the women's singles tennis title at the 1980 US Open. It was her fifth US Open title and her eleventh major singles title overall.
Tracy Austin was the defending champion, but lost in the semifinals to Evert in a rematch of the previous year's final.
The seeded players are listed below. Chris Evert is the champion; others show the round in which they were eliminated.
See main article: 1980 US Open – Women's singles qualifying.