Youngest male US Open winner is Michael Chang, in 1989 at the age of 17 years and 2 months.Youngest female US Open winner is Tracy Austin, in 1979 at the age of 16 years and 9 months.
Oldest male US Open winner is Bill Tilden, in 1931 at the age of 37 years and the oldest female US Open winner is Margaret Court, who won in 1973 at the age of 31 years