The Top Ten: Youngest U.S. Presidents
Updated November 8, 2020 | Infoplease Staff
Youngest U.S. Presidents (By age upon taking office)
Note: Roosevelt was sworn in after the assassination of William McKinley in 1901, making Kennedy the youngest president actually voted to the office. At 70, Donald J. Trump was the oldest president to take office. At 78, Joe Biden will assume the title of oldest president at inauguration.