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.
Inauguration of John Quincy Adams
The inauguration of John Quincy Adams as the sixth President of the United States took place on Friday, March 4, 1825, in the House Chamber of the U.S. Capitol in Washington, D.C.. The inauguration marked the commencement of the four-year term of John Quincy Adams as President and the first term of John C. Calhoun as Vice President. Adams was the first president to have been the son of a former President–John Adams; and Calhoun, at age 42 on Inauguration Day, was the second-youngest vice president (after Daniel D. Tompkins, who was 3 months younger when inaugurated into office in 1817).