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.
Bobby Jindal
In 1996, Jindal was appointed secretary of the Louisiana Department of Health and Hospitals and in 1999, at age 28, he was appointed as the youngest president in the history of the University of Louisiana System. In 2001, President George W. Bush appointed Jindal as principal adviser to the U.S. Secretary of Health and Human Services.