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.
John Adams
On July 4, 1826, the 50th anniversary of the adoption of the Declaration of Independence, Adams died at his home in Quincy at approximately 6:20 PM. At age 90, Adams was the longest-lived US president until Ronald Reagan surpassed that age in 2001. Adams' crypt lies at United First Parish Church in Quincy, Massachusetts, with his wife Abigail and son John Quincy Adams. At the time of his death, John Quincy Adams was serving as U.S. President. When Adams died, his last words included an acknowledgement of his longtime friend and rival: "Thomas Jefferson survives." Adams was unaware that Jefferson had died several hours before.