If you mean all four tournaments (Australian Open, French Open, Wimbledon, U.S. Open) that would be Maureen Connolly in 1953 at the age of 19. Steffi Graf was also 19 when she won the Grand Slam in 1987 but was three months older than Connolly. The youngest woman to win a Grand Slam title was Martina Hingis who won the doubles event at Wimbledon (with Helena Sukova) in 1996 at 15 years 9 months. Hingis is also the youngest woman to win a Grand Slam singles title, winning the 1997 Australian Open at 16 years, 3 months.
Chat with our AI personalities
The youngest female contestant to win the Wimbledon women's single title was 'Lottie' (Charlotte) Dod from Bebington, Cheshire,U.K. in 1887 at the age of 15. However the youngest overall player to win a Wimbledon title was Martina Hingis from (Czechoslovakia/Slovakia) who won the women's Doubles title (also at the age of 15 but 3 days younger than Lottie!) playing with Helena Sukova also from (Czechoslovakia/Slovakia) in 1996. Hingis went on to win the Wimbledon women's single title at 16 years old in 1997 beating Jana Navotna(Czechoslovakia/Czech Republic) and is therfore the second youngest player to win a womens single title at Wimbledon. The third youngest is Maria Sharapova (Russia) who won at the age of 17 in 2004.
That was the 2008 winner, Inbee Park of South Korea, who was 2 weeks short of her 20th birthday when she won the event.