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.
Eustorgio Salgar
Eustorgio Salgar Moreno Salazar (1831–1885) was a lawyer, Colombian general and political figure, who was president of the United States of Colombia from 1870 until 1872. Elected at age 39, he was the youngest President of Colombia.