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
Harding and his first wife had eight children together (six boys and two girls), born over a 14-year period. Harding's oldest child, Warren Gamaliel Harding, became (in order) a state senator, Lieutenant Governor of Ohio, Senator from Ohio, and finally President of the United States. President Harding had a reasonably close relationship with his father, especially in his youth, and was grateful to him for providing a college education and teaching him the basics of the newspaper business.