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.
Presidents of the United States on U.S. postage stamps
Martin Van Buren (December 5, 1782 – July 24, 1862) was the eighth President of the United States from 1837 to 1841. Before his presidency, he served as the eighth Vice President (1833–1837) and the 10th Secretary of State under Andrew Jackson. Van Buren was the first U.S. President to be born an American citizen.