The Top Ten: Youngest U.S. Presidents

Updated April 27, 2021 | Infoplease Staff
Youngest U.S. Presidents (By age upon taking office)

1.Theodore Roosevelt42322
2.John F. Kennedy43236
3.Bill Clinton46154
4.Ulysses S. Grant46236
5.Barack Obama47169
6.Grover Cleveland47351
7.Franklin Pierce48101
8.James Garfield49105
9.James K. Polk49122
10.Millard Fillmore50184
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. 


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