<P> Assassinated three years into his term , John F. Kennedy was the youngest at the time of leaving office ( 46 years , 177 days ) ; the youngest president to leave office at the conclusion of a normal transition was Theodore Roosevelt ( 50 years , 128 days ) . The oldest at the time of leaving office was Ronald Reagan ( 77 years , 349 days ) . </P>
<P> Assassinated three years into his term , John F. Kennedy was the youngest at the time of leaving office ( 46 years , 177 days ) ; the youngest president to leave office at the conclusion of a normal transition was Theodore Roosevelt ( 50 years , 128 days ) . The oldest at the time of leaving office was Ronald Reagan ( 77 years , 349 days ) . </P>
who was the youngest us president to die in office
who was the youngest us president to die in office
John F. Kennedy
John F. Kennedy