What is the Most Common Age to Win an Oscar?

For Best Actress, between ages 25 to 39

Best Actress winners ages 25 to 39: 59
Best Actress winners ages 40 to 54: 15

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For Best Actor, between ages 40 to 54

Best Actor winners ages 25 to 39: 31
Best Actor winners ages 40 to 54: 46

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For Supporting Actress and Actor, the age range is wider

Best Supporting Actress winners ages 40 to 54: 24
Best Supporting Actor winners ages 40 to 54: 34

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