1970 US Open – Women's singles

Women's singles
1970 US Open
Champion Margaret Court
Runner-up Rosie Casals
Score6–2, 2–6, 6–1
Draw64
Seeds8

Defending champion Margaret Court defeated Rosie Casals in the final, 6–2, 2–6, 6–1 to win the women's singles tennis title at the 1970 US Open. With the win, Court completed the Grand Slam, the first woman in the Open Era to do so in singles. It was her fourth US singles title and record 20th major singles title, surpassing Helen Wills' all-time tally.