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.
Emilio Aguinaldo
Emilio Aguinaldo y Famy (: March 22, 1869 – February 6, 1964) was a Filipino revolutionary, politician, and military leader who is officially recognized as the first and the youngest President of the Philippines (1899–1901) and first president of a constitutional republic in Asia. He led Philippine forces first against Spain in the latter part of the Philippine Revolution (1896–1898), and then in the Spanish–American War (1898), and finally against the United States during the Philippine–American War (1899–1901).