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George Washington was 55 years old at the beginning of the Constitutional Convention. The convention was held in 1787 in Philadelphia.
James Madison was at the age of 36 at the constitutional convention.
Good old Ben Franklin was the oldest member of the Constitutional convention.
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May be, 81 because he joined constitutional convention in 1787 and was born in 1706. So, it clearly state that he was 81 at the time of joining constitutional convention.
He was 36 when the convention took place.
The oldest leader at the oldest leader at the constitutional convention was Ben Franklin, he was 81 years old :0
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He is known to be 35 years old.
The oldest delegate at the Constitutional Convention, which took place in Philadelphia, PA, was Benjamin Franklin. He was 81 years old at the time of the convention.
He was 42 years of age.
Elbridge Gerry