The Top Ten Youngest U.S. Presidents
10. Millard Fillmore 50 Years 184 Days
9. James K. Polk 49 Years 122 Days
8. James Garfield 49 Years 105 Days
7. Franklin Pierce 48 Years 101 Days
6. Grover Cleveland 47 Years 351 Days
5. Barack Obama 47 Years 169 Days
4. Ulysses S. Grant 46 Years 236 Days
3. Bill Clinton 46 Years 154 Days
2. John F. Kennedy 43 Years 236 Days
1. Theodore Roosevelt 42 Years 322 Days