| President | Age at Inauguration | Birth Date | Inauguration Date |
|---|---|---|---|
| Donald Trump (2nd term) | 78 years, 220 days | June 14, 1946 | Jan 20, 2025 |
| Joe Biden | 78 years, 61 days | Nov 20, 1942 | Jan 20, 2021 |
| Donald Trump (1st term) | 70 years, 220 days | June 14, 1946 | Jan 20, 2017 |
| Ronald Reagan | 69 years, 349 days | Feb 6, 1911 | Jan 20, 1981 |
| William Henry Harrison | 68 years, 23 days | Feb 9, 1773 | March 4, 1841 |
| James Buchanan | 65 years, 315 days | April 23, 1791 | March 4, 1857 | George Bush | 64 years, 222 days | June 12, 1924 | Jan 20, 1989 |
| Zachary Taylor | 64 years, 100 days | Nov 24, 1784 | March 4, 1849 |
| Dwight Eisenhower | 62 years, 98 days | Oct 14, 1890 | Jan 20, 1953 |
| Andrew Jackson | 61 years, 354 days | March 15, 1767 | March 4, 1829 |
| John Adams | 61 years, 125 days | Oct 30, 1735 | March 4, 1797 |
| Gerald Ford | 61 years, 26 days | July 14, 1913 | Aug 9, 1974 |
| Harry S. Truman | 60 years, 339 days | May 8, 1884 | April 12, 1945 |
| James Monroe | 58 years, 310 days | April 28, 1758 | March 4, 1817 |
| James Madison | 57 years, 353 days | March 16, 1751 | March 4, 1809 |
| Thomas Jefferson | 57 years, 325 days | April 13, 1743 | March 4, 1801 |
| John Quincy Adams | 57 years, 236 days | July 11, 1767 | March 4, 1825 |
| George Washington | 57 years, 67 days | Feb 22, 1732 | April 30, 1789 |
| Andrew Johnson | 56 years, 107 days | Dec 29, 1808 | April 15, 1865 |
| Woodrow Wilson | 56 years, 66 days | Dec 28, 1856 | March 4, 1913 |
| Richard Nixon | 56 years, 11 days | Jan 9, 1913 | Jan 20, 1969 |
| Grover Cleveland (2nd term) | 55 years, 351 days | March 18, 1837 | March 4, 1893 |
| Benjamin Harrison | 55 years, 196 days | Aug 20, 1833 | March 4, 1889 |
| Warren G. Harding | 55 years, 122 days | Nov 2, 1865 | March 4, 1921 |
| Lyndon B. Johnson | 55 years, 87 days | Aug 27, 1908 | Nov 22, 1963 |
| Herbert Hoover | 54 years, 206 days | Aug 10, 1874 | March 4, 1929 | George W. Bush | 54 years, 198 days | July 6, 1946 | Jan 20, 2001 |
| Rutherford B. Hayes | 54 years, 151 days | Oct 4, 1822 | March 4, 1877 |
| Martin Van Buren | 54 years, 89 days | Dec 5, 1782 | March 4, 1837 |
| William McKinley | 54 years, 34 days | Jan 29, 1843 | March 4, 1897 |
| Jimmy Carter | 52 years, 111 days | Oct 1, 1924 | Jan 20, 1977 |
| Abraham Lincoln | 52 years, 20 days | Feb 12, 1809 | March 4, 1861 |
| Chester Arthur | 51 years, 349 days | Oct 5, 1829 | Sept 19, 1881 |
| William Howard Taft | 51 years, 170 days | Sep 15, 1857 | March 4, 1909 |
| Franklin Roosevelt | 51 years, 33 days | Jan 30, 1882 | March 4, 1933 |
| Calvin Coolidge | 51 years, 29 days | July 4, 1872 | Aug 2, 1923 |
| John Tyler | 51 years, 6 days | March 29, 1790 | April 4, 1841 |
| Millard Fillmore | 50 years, 183 days | Jan 7, 1800 | July 9, 1850 |
| James K. Polk | 49 years, 122 days | Nov 2, 1795 | March 4, 1845 |
| James A. Garfield | 49 years, 105 days | Nov 19, 1831 | March 4, 1881 |
| Franklin Pierce | 48 years, 101 days | Nov 23, 1804 | March 4, 1853 |
| Grover Cleveland (1st term) | 47 years, 351 days | March 18, 1837 | March 4, 1885 |
| Barack Obama | 47 years, 169 days | Aug 4, 1961 | Jan 20, 2009 |
| Ulysses S. Grant | 46 years, 311 days | April 27, 1822 | March 4, 1869 |
| Bill Clinton | 46 years, 154 days | Aug 19, 1946 | Jan 20, 1993 |
| John F. Kennedy | 43 years, 236 days | May 29, 1917 | Jan 20, 1961 |
| Theodore Roosevelt | 42 years, 322 days | Oct 27, 1858 | Sept 14, 1901 |