The youngest woman to ever win an Olympic gold medal was Helene Mayer of Germany. She won the Women's Individual Foil event in 1928 at the age of 17.
Gillian Sheen was the first and only British woman to win a gold medal in Olympic fencing. She did it in 1956, at the age of 28, in the Individual Women's Foil event.
That was Marjorie Gestring of the United States who won gold in 3 meter springboard diving at the 1936 Games in Berlin. She the youngest person to win a gold medal in Olympic history, man or woman.
The first Indian woman to ever win an Olympic medal was Karnam Malleswari.
Charlotte Cooper became the first female to win an Olympic Gold Medal (for tennis) in 1900.
That was ladies singles tennis and the first woman to win an Olympic gold medal was Charlotte Cooper of Great Britain at the 1900 Games in Paris.
Tara Lipinski. She is still the youngest woman ever to have won the Olympic gold medal in figure skating, at age fifteen.
Mariel Zagunis of the United States.
Gladys Davis won a silver medal at the 1924 Olympics in the Individual Women's Foil event.
Gabby Douglas won the Woman's All-Around Gold Medal in the 2012 Olympic Games in London for gymnastics.