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.
List of children of the Presidents of the United States
This is a list of children of U.S. Presidents, including stepchildren and alleged illegitimate children. All full names with married names are given. Currently there are 31 confirmed, known living presidential children, the oldest Lynda Bird Johnson Robb, the youngest confirmed Barron Trump. Two presidential children, John Quincy Adams and George W. Bush, have become president in their own right.