<page_title> List of presidents of the United States by age </page_title> <section_title> Table </section_title> <table> <cell> Theodore Roosevelt <col_header> President </col_header> <col_header> Age </col_header> </cell> <cell> 50 years, 128 days Mar 4, 1909 <col_header> Age at end of presidency </col_header> </cell> <cell> John F. Kennedy <col_header> President </col_header> <col_header> Age </col_header> </cell> <cell> 46 years, 177 days Nov 22, 1963 <col_header> Age at end of presidency </col_header> </cell> </table>
John F. Kennedy was the youngest at the time of his departure from office (46 years, 177 days); the president to leave office at the normal transition was Theodore Roosevelt (50 years, 128 days).