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.
George Tryon Harding
George Tryon Harding II (June 12, 1843 – November 19, 1928), known as Tryon Harding (often misspelled "Tyron"), was an American physician and businessman who is best known as the father of Warren G. Harding, the 29th President of the United States. He was the first presidential father to outlive his son, and the second presidential father (after Nathaniel Fillmore) to live through his son's presidency. In his biography of Warren G. Harding, Charles L. Mee describes Tryon Harding as "a small, idle, shiftless, impractical, lazy, daydreaming, catnapping fellow whose eye was always on the main chance".