List of presidents of the United States by age
The median age upon accession to the presidency is 55 years and 3 months. This is how old Lyndon B. Johnson was at the time of his inauguration. The youngest person to assume the office was Theodore Roosevelt, who became president at the age of , following William McKinley's assassination; the oldest was Donald Trump, who was old at his inauguration. The youngest person to be elected president was John F. Kennedy, at of age on election day; the oldest was Ronald Reagan, who was old at the time of his election to a second term.
Richard Falley Cleveland
Cleveland's fifth son, Grover Cleveland, became the 22nd and 24th President of the United States, the only president to serve non-consecutive terms. He was 16 years old at the time of his father's death, and reputedly learned of the event from a boy hawking newspapers. Grover Cleveland spoke highly of his father in later life, praising his godliness and devotion to family, and named one of his sons (Richard F. Cleveland) after him. His sister Rose (the family's youngest child) acted as First Lady for the first year or so of his presidency, before his marriage to Frances Folsom.