Youngest U.S. Presidents
(By age upon taking office)

Rank President Years Days
1. Theodore Roosevelt 42 322
2. John F. Kennedy 43 236
3. Bill Clinton 46 154
4. Ulysses S. Grant 46 236
5. Barak Obama ..........................
6. Grover Cleveland 47 351
7. Franklin Pierce 48 101
8. James Garfield 49 105
9. James K. Polk 49 122
10. Millard Fillmore 50 184
11. Chester A. Arthur 50 350