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.
Gerald R. Ford Presidential Museum
Gerald Rudolph Ford, Jr. (born Leslie Lynch King, Jr.) was born on July 14, 1913. Ford served nearly 25 years as a Representative of Michigan's 5th congressional district, eight of them as the Republican Minority Leader. Serving from 1973 to 1974 as the 40th Vice President of the United States, Ford was the first person appointed to the vice-presidency under the terms of the 25th Amendment. He then became President upon Richard Nixon's resignation on August 9, 1974, and served until January 20, 1977 as the 38th President of the United States. Ford is the only President of the United States who was not elected by ballot for his terms as either President or Vice-President.