List of presidents of the United States by age - wikipedia List of presidents of the United States by age This is a list of presidents of the United States by age. The first table charts the age of each United States president at the time of presidential inauguration ( first inauguration if elected to multiple and consecutive terms ), upon leaving office, and at the time of death. Each president 's lifespan ( age at death ) is measured in two ways, to allow for the differing number of leap days that each experienced. The first figure is the number of days between the president 's date of birth and date of death, allowing for leap days ; in parentheses, the same period is given in years and days, with the years being the number of whole years that the president lived, and the days being the number of days since the last birthday. Where the president is still living, their lifespan is calculated up to November 7, 2017. The second table includes those presidents who had the distinction among their peers of being the oldest living president, and charts both when they became and ceased to be oldest living. Contents 1 Overview 2 List of presidents by age 2.1 Notes 3 Timeline of oldest living presidents 4 Sources Overview See also : Lifespan timeline of Presidents of the United States Age of presidents when assuming office approximately follows a bell curve ( mean age marked by red line, c. 55.5 years ) The median age upon accession to the presidency is roughly 55 years and 6 months, which is about how old Benjamin Harrison was at the time of his inauguration. The youngest person to assume the office was Theodore Roosevelt, who became president following William McKinley 's assassination, at the age of 7004156620000000000 ♠ 42 years, 322 days. The youngest person elected president was John F. Kennedy, who was inaugurated into office at the age of 7004159420000000000 ♠ 43 years, 236 days. Assassinated three years into his term, he became the youngest at the time of leaving office ( 7004169780000000000 ♠ 46 years, 177 days ) ; the youngest person at the time of leaving office after serving a full four - year term was Theodore Roosevelt ( 7004183900000000000 ♠ 50 years, 128 days ). The oldest person at the time of entering office was Donald Trump, at the age of 7004257880000000000 ♠ 70 years, 220 days ; Ronald Reagan was the oldest person in office, at the age of 7004284730000000000 ♠ 77 years, 349 days when his presidency ended in January 1989. The oldest living U.S. president is George H.W. Bush, born June 12, 1924 ( age 7004341160000000000 ♠ 93 years, 148 days ). The second oldest, Jimmy Carter, has the distinction of having the longest post-presidency in U.S. history, currently at 7004134400000000000 ♠ 36 years, 291 days. The youngest living president is Barack Obama, born August 4, 1961 ( age 7004205490000000000 ♠ 56 years, 95 days ). The longest - lived president was Gerald Ford, who died at the age of 7004341330000000000 ♠ 93 years, 165 days. He surpassed Ronald Reagan for this distinction on November 12, 2006, 44 days prior to his death. ( Reagan had surpassed the 7004331190000000000 ♠ 90 years, 247 days lifespan of the nation 's second president, John Adams, on October 12, 2001. ) The shortest - lived president to have died by natural causes ( thereby excluding John F. Kennedy and James A. Garfield, who were both assassinated ) was James K. Polk, who died at the age of 7004195830000000000 ♠ 53 years, 225 days ; only 103 days after leaving office. Since 1797, when George Washington 's service as president ended, there have been five periods in American history where the only living president was the incumbent president. John Adams, December 14, 1799 to March 4, 1801, between the death of George Washington, and the first inauguration of Thomas Jefferson Ulysses S. Grant, July 31, 1875 to March 4, 1877, between the death of Andrew Johnson and the inauguration of Rutherford B. Hayes Theodore Roosevelt, June 24, 1908 to March 4, 1909, between the death of Grover Cleveland and the inauguration of William Howard Taft Herbert Hoover, January 5, 1933 to March 4, 1933, between the death of Calvin Coolidge and the first inauguration of Franklin D. Roosevelt Richard Nixon, January 22, 1973 to August 9, 1974, between the death of Lyndon B. Johnson and the inauguration of Gerald Ford. The greatest number of presidents -- former presidents plus the incumbent -- alive at any given time is six, which has happened four times. Including : Martin Van Buren, John Tyler, Millard Fillmore, Franklin Pierce, James Buchanan, and Abraham Lincoln ; between March 4, 1861 ( Abraham Lincoln 's first inauguration ) and January 18, 1862 ( John Tyler 's death ) Including : Richard Nixon, Gerald Ford, Jimmy Carter, Ronald Reagan, George H.W. Bush, and Bill Clinton ; between January 20, 1993 ( Bill Clinton 's first inauguration ) and April 22, 1994 ( Richard Nixon 's death ) Including : Gerald Ford, Jimmy Carter, Ronald Reagan, George H.W. Bush, Bill Clinton and George W. Bush ; between January 20, 2001 ( George W. Bush 's first inauguration ) and June 5, 2004 ( Ronald Reagan 's death ) Including : Jimmy Carter, George H.W. Bush, Bill Clinton, George W. Bush, Barack Obama and Donald Trump ; began on January 20, 2017 ( Donald Trump 's inauguration ) and is ongoing. Six U.S. presidents have lived into their 90s. They are ( in order of birth ) : John Adams ( 1735 -- 1826 ) Herbert Hoover ( 1874 -- 1964 ) Ronald Reagan ( 1911 -- 2004 ) Gerald Ford ( 1913 -- 2006 ) George H.W. Bush ( born 1924 ) Jimmy Carter ( born 1924 ) List of presidents by age # President Birth date Presidency start date Age at start date Presidency end date Age at end date Post-presidency timespan Death date Lifespan Washington, George George Washington 000000001732 - 02 - 22 - 0000 Feb 22, 1732 000000001789 - 04 - 30 - 0000 Apr 30, 1789 7004208870000000000 ♠ 57 years, 67 days 000000001797 - 03 - 04 - 0000 Mar 4, 1797 7004237520000000000 ♠ 65 years, 10 days 01,015 1,015 days ( 7003101500000000000 ♠ 2 years, 285 days ) 000000001799 - 12 - 14 - 0000 Dec 14, 1799 7004247670000000000 ♠ 67 years, 295 days ( 24,767 days ) Adams, John A. John Adams 000000001735 - 10 - 30 - 0000 Oct 30, 1735 000000001797 - 03 - 04 - 0000 Mar 4, 1797 7004224060000000000 ♠ 61 years, 125 days 000000001801 - 03 - 04 - 0000 Mar 4, 1801 7004238660000000000 ♠ 65 years, 125 days 09,253 9,253 days ( 7003925300000000000 ♠ 25 years, 122 days ) 000000001826 - 07 - 04 - 0000 Jul 4, 1826 7004331190000000000 ♠ 90 years, 247 days ( 33,119 days ) Jefferson, Thomas Thomas Jefferson 000000001743 - 04 - 13 - 0000 Apr 13, 1743 000000001801 - 03 - 04 - 0000 Mar 4, 1801 7004211440000000000 ♠ 57 years, 325 days 000000001809 - 03 - 04 - 0000 Mar 4, 1809 7004240660000000000 ♠ 65 years, 325 days 06,331 6,331 days ( 7003633100000000000 ♠ 17 years, 122 days ) 000000001826 - 07 - 04 - 0000 Jul 4, 1826 7004303970000000000 ♠ 83 years, 82 days ( 30,397 days ) Madison, James James Madison 000000001751 - 03 - 16 - 0000 Mar 16, 1751 000000001809 - 03 - 04 - 0000 Mar 4, 1809 7004211720000000000 ♠ 57 years, 353 days 000000001817 - 03 - 04 - 0000 Mar 4, 1817 7004240940000000000 ♠ 65 years, 353 days 07,056 7,056 days ( 7003705600000000000 ♠ 19 years, 116 days ) 000000001836 - 06 - 28 - 0000 Jun 28, 1836 7004311500000000000 ♠ 85 years, 104 days ( 31,150 days ) Monroe, James James Monroe 000000001758 - 04 - 28 - 0000 Apr 28, 1758 000000001817 - 03 - 04 - 0000 Mar 4, 1817 7004214940000000000 ♠ 58 years, 310 days 000000001825 - 03 - 04 - 0000 Mar 4, 1825 7004244160000000000 ♠ 66 years, 310 days 02,313 2,313 days ( 7003231300000000000 ♠ 6 years, 122 days ) 000000001831 - 07 - 04 - 0000 Jul 4, 1831 7004267290000000000 ♠ 73 years, 67 days ( 26,729 days ) 6 Adams, John Q. John Q. Adams 000000001767 - 07 - 11 - 0000 Jul 11, 1767 000000001825 - 03 - 04 - 0000 Mar 4, 1825 7004210550000000000 ♠ 57 years, 236 days 000000001829 - 03 - 04 - 0000 Mar 4, 1829 7004225160000000000 ♠ 61 years, 236 days 06,930 6,930 days ( 7003693000000000000 ♠ 18 years, 356 days ) 000000001848 - 02 - 23 - 0000 Feb 23, 1848 7004294460000000000 ♠ 80 years, 227 days ( 29,446 days ) 7 Jackson, Andrew Andrew Jackson 000000001767 - 03 - 15 - 0000 Mar 15, 1767 000000001829 - 03 - 04 - 0000 Mar 4, 1829 7004226340000000000 ♠ 61 years, 354 days 000000001837 - 03 - 04 - 0000 Mar 4, 1837 7004255560000000000 ♠ 69 years, 354 days 03,018 3,018 days ( 7003301800000000000 ♠ 8 years, 96 days ) 000000001845 - 06 - 08 - 0000 Jun 8, 1845 7004285740000000000 ♠ 78 years, 85 days ( 28,574 days ) 8 Van Buren, Martin Martin Van Buren 000000001782 - 12 - 05 - 0000 Dec 5, 1782 000000001837 - 03 - 04 - 0000 Mar 4, 1837 7004198120000000000 ♠ 54 years, 89 days 000000001841 - 03 - 04 - 0000 Mar 4, 1841 7004212730000000000 ♠ 58 years, 89 days 07,812 7,812 days ( 7003781200000000000 ♠ 21 years, 142 days ) 000000001862 - 07 - 24 - 0000 Jul 24, 1862 7004290850000000000 ♠ 79 years, 231 days ( 29,085 days ) 9 Harrison, William H. William H. Harrison 000000001773 - 02 - 09 - 0000 Feb 9, 1773 000000001841 - 03 - 04 - 0000 Mar 4, 1841 7004248590000000000 ♠ 68 years, 23 days 000000001841 - 04 - 04 - 0000 Apr 4, 1841 7004248900000000000 ♠ 68 years, 54 days 00,000 0 days 000000001841 - 04 - 04 - 0000 Apr 4, 1841 7004248900000000000 ♠ 68 years, 54 days ( 24,890 days ) 10 Tyler, John John Tyler 000000001790 - 03 - 29 - 0000 Mar 29, 1790 000000001841 - 04 - 04 - 0000 Apr 4, 1841 7004186330000000000 ♠ 51 years, 6 days 000000001845 - 03 - 04 - 0000 Mar 4, 1845 7004200630000000000 ♠ 54 years, 340 days 06,164 6,164 days ( 7003616400000000000 ♠ 16 years, 320 days ) 000000001862 - 01 - 18 - 0000 Jan 18, 1862 7004262270000000000 ♠ 71 years, 295 days ( 26,227 days ) 11 Polk, James K. James K. Polk 000000001795 - 11 - 02 - 0000 Nov 2, 1795 000000001845 - 03 - 04 - 0000 Mar 4, 1845 7004180190000000000 ♠ 49 years, 122 days 000000001849 - 03 - 04 - 0000 Mar 4, 1849 7004194800000000000 ♠ 53 years, 122 days 00,103 103 days 000000001849 - 06 - 15 - 0000 Jun 15, 1849 7004195830000000000 ♠ 53 years, 225 days ( 19,583 days ) 12 Taylor, Zachary Zachary Taylor 000000001784 - 11 - 24 - 0000 Nov 24, 1784 000000001849 - 03 - 04 - 0000 Mar 4, 1849 7004234750000000000 ♠ 64 years, 100 days 000000001850 - 07 - 09 - 0000 Jul 9, 1850 7004239670000000000 ♠ 65 years, 227 days 00,000 0 days 000000001850 - 07 - 09 - 0000 Jul 9, 1850 7004239670000000000 ♠ 65 years, 227 days ( 23,967 days ) 13 Fillmore, Millard Millard Fillmore 000000001800 - 01 - 07 - 0000 Jan 7, 1800 000000001850 - 07 - 09 - 0000 Jul 9, 1850 7004184450000000000 ♠ 50 years, 183 days 000000001853 - 03 - 04 - 0000 Mar 4, 1853 7004194140000000000 ♠ 53 years, 56 days 07,674 7,674 days ( 7003767400000000000 ♠ 21 years, 4 days ) 000000001874 - 03 - 08 - 0000 Mar 8, 1874 7004270880000000000 ♠ 74 years, 60 days ( 27,088 days ) 14 Pierce, Franklin Franklin Pierce 000000001804 - 11 - 23 - 0000 Nov 23, 1804 000000001853 - 03 - 04 - 0000 Mar 4, 1853 7004176330000000000 ♠ 48 years, 101 days 000000001857 - 03 - 04 - 0000 Mar 4, 1857 7004190940000000000 ♠ 52 years, 101 days 04,601 4,601 days ( 7003460100000000000 ♠ 12 years, 218 days ) 000000001869 - 10 - 08 - 0000 Oct 8, 1869 7004236950000000000 ♠ 64 years, 319 days ( 23,695 days ) 15 Buchanan, James James Buchanan 000000001791 - 04 - 23 - 0000 Apr 23, 1791 000000001857 - 03 - 04 - 0000 Mar 4, 1857 7004240560000000000 ♠ 65 years, 315 days 000000001861 - 03 - 04 - 0000 Mar 4, 1861 7004255170000000000 ♠ 69 years, 315 days 02,646 2,646 days ( 7003264600000000000 ♠ 7 years, 89 days ) 000000001868 - 06 - 01 - 0000 Jun 1, 1868 7004281630000000000 ♠ 77 years, 39 days ( 28,163 days ) 16 Lincoln, Abraham Abraham Lincoln 000000001809 - 02 - 12 - 0000 Feb 12, 1809 000000001861 - 03 - 04 - 0000 Mar 4, 1861 7004190130000000000 ♠ 52 years, 20 days 000000001865 - 04 - 15 - 0000 Apr 15, 1865 7004205160000000000 ♠ 56 years, 62 days 00,000 0 days 000000001865 - 04 - 15 - 0000 Apr 15, 1865 7004205160000000000 ♠ 56 years, 62 days ( 20,516 days ) 17 Johnson, Andrew Andrew Johnson 000000001808 - 12 - 29 - 0000 Dec 29, 1808 000000001865 - 04 - 15 - 0000 Apr 15, 1865 7004205610000000000 ♠ 56 years, 107 days 000000001869 - 03 - 04 - 0000 Mar 4, 1869 7004219800000000000 ♠ 60 years, 65 days 02,340 2,340 days ( 7003234000000000000 ♠ 6 years, 149 days ) 000000001875 - 07 - 31 - 0000 Jul 31, 1875 7004243200000000000 ♠ 66 years, 214 days ( 24,320 days ) 18 Grant, Ulysses S. Ulysses S. Grant 000000001822 - 04 - 27 - 0000 Apr 27, 1822 000000001869 - 03 - 04 - 0000 Mar 4, 1869 7004171130000000000 ♠ 46 years, 311 days 000000001877 - 03 - 04 - 0000 Mar 4, 1877 7004200350000000000 ♠ 54 years, 311 days 03,063 3,063 days ( 7003306300000000000 ♠ 8 years, 141 days ) 000000001885 - 07 - 23 - 0000 Jul 23, 1885 7004230980000000000 ♠ 63 years, 87 days ( 23,098 days ) 19 Hayes, Rutherford B. Rutherford B. Hayes 000000001822 - 10 - 04 - 0000 Oct 4, 1822 000000001877 - 03 - 04 - 0000 Mar 4, 1877 7004198750000000000 ♠ 54 years, 151 days 000000001881 - 03 - 04 - 0000 Mar 4, 1881 7004213360000000000 ♠ 58 years, 151 days 04,337 4,337 days ( 7003433700000000000 ♠ 11 years, 319 days ) 000000001893 - 01 - 17 - 0000 Jan 17, 1893 7004256730000000000 ♠ 70 years, 105 days ( 25,673 days ) 20 Garfield, James A. James A. Garfield 000000001831 - 11 - 19 - 0000 Nov 19, 1831 000000001881 - 03 - 04 - 0000 Mar 4, 1881 7004180030000000000 ♠ 49 years, 105 days 000000001881 - 09 - 19 - 0000 Sep 19, 1881 7004182020000000000 ♠ 49 years, 304 days 00,000 0 days 000000001881 - 09 - 19 - 0000 Sep 19, 1881 7004182020000000000 ♠ 49 years, 304 days ( 18,202 days ) 21 Arthur, Chester A. Chester A. Arthur 000000001829 - 10 - 05 - 0000 Oct 5, 1829 000000001881 - 09 - 19 - 0000 Sep 19, 1881 7004189770000000000 ♠ 51 years, 349 days 000000001885 - 03 - 04 - 0000 Mar 4, 1885 7004202390000000000 ♠ 55 years, 150 days 00,624 624 days ( 7002624000000000000 ♠ 1 year, 259 days ) 000000001886 - 11 - 18 - 0000 Nov 18, 1886 7004208630000000000 ♠ 57 years, 44 days ( 20,863 days ) 22 Cleveland, Grover Grover Cleveland 000000001837 - 03 - 18 - 0000 Mar 18, 1837 000000001885 - 03 - 04 - 0000 Mar 4, 1885 7004175180000000000 ♠ 47 years, 351 days 000000001889 - 03 - 04 - 0000 Mar 4, 1889 7004189790000000000 ♠ 51 years, 351 days 05,590 5,590 days ( 15 years, 112 days ) 000000001908 - 06 - 24 - 0000 Jun 24, 1908 7004260300000000000 ♠ 71 years, 98 days ( 26,030 days ) 23 Harrison, Benjamin Benjamin Harrison 000000001833 - 08 - 20 - 0000 Aug 20, 1833 000000001889 - 03 - 04 - 0000 Mar 4, 1889 7004202850000000000 ♠ 55 years, 196 days 000000001893 - 03 - 04 - 0000 Mar 4, 1893 7004217460000000000 ♠ 59 years, 196 days 02,930 2,930 days ( 7003293000000000000 ♠ 8 years, 9 days ) 000000001901 - 03 - 13 - 0000 Mar 13, 1901 7004246760000000000 ♠ 67 years, 205 days ( 24,676 days ) 24 Cleveland, Grover Grover Cleveland 000000001837 - 03 - 18 - 0000 Mar 18, 1837 000000001893 - 03 - 04 - 0000 Mar 4, 1893 7004204400000000000 ♠ 55 years, 351 days 000000001897 - 03 - 04 - 0000 Mar 4, 1897 7004219010000000000 ♠ 59 years, 351 days 05,590 5,590 days ( 15 years, 112 days ) 000000001908 - 06 - 24 - 0000 Jun 24, 1908 7004260300000000000 ♠ 71 years, 98 days ( 26,030 days ) 25 McKinley, William William McKinley 000000001843 - 01 - 29 - 0000 Jan 29, 1843 000000001897 - 03 - 04 - 0000 Mar 4, 1897 7004197580000000000 ♠ 54 years, 34 days 000000001901 - 09 - 14 - 0000 Sep 14, 1901 7004214120000000000 ♠ 58 years, 228 days 00,000 0 days 000000001901 - 09 - 14 - 0000 Sep 14, 1901 7004214120000000000 ♠ 58 years, 228 days ( 21,412 days ) 26 Roosevelt, Theodore Theodore Roosevelt 000000001858 - 10 - 27 - 0000 Oct 27, 1858 000000001901 - 09 - 14 - 0000 Sep 14, 1901 7004156620000000000 ♠ 42 years, 322 days 000000001909 - 03 - 04 - 0000 Mar 4, 1909 7004183900000000000 ♠ 50 years, 128 days 03,595 3,595 days ( 7003359500000000000 ♠ 9 years, 308 days ) 000000001919 - 01 - 06 - 0000 Jan 6, 1919 7004219850000000000 ♠ 60 years, 71 days ( 21,985 days ) 27 Taft, William H. William H. Taft 000000001857 - 09 - 15 - 0000 Sep 15, 1857 000000001909 - 03 - 04 - 0000 Mar 4, 1909 7004187970000000000 ♠ 51 years, 170 days 000000001913 - 03 - 04 - 0000 Mar 4, 1913 7004202580000000000 ♠ 55 years, 170 days 06,213 6,213 days ( 7003621300000000000 ♠ 17 years, 4 days ) 000000001930 - 03 - 08 - 0000 Mar 8, 1930 7004264710000000000 ♠ 72 years, 174 days ( 26,471 days ) 28 Wilson, Woodrow Woodrow Wilson 000000001856 - 12 - 28 - 0000 Dec 28, 1856 000000001913 - 03 - 04 - 0000 Mar 4, 1913 7004205190000000000 ♠ 56 years, 66 days 000000001921 - 03 - 04 - 0000 Mar 4, 1921 7004234410000000000 ♠ 64 years, 66 days 01,066 1,066 days ( 7003106600000000000 ♠ 2 years, 336 days ) 000000001924 - 02 - 03 - 0000 Feb 3, 1924 7004245070000000000 ♠ 67 years, 37 days ( 24,507 days ) 29 Harding, Warren G. Warren G. Harding 000000001865 - 11 - 02 - 0000 Nov 2, 1865 000000001921 - 03 - 04 - 0000 Mar 4, 1921 7004202100000000000 ♠ 55 years, 122 days 000000001923 - 08 - 02 - 0000 Aug 2, 1923 7004210910000000000 ♠ 57 years, 273 days 00,000 0 days 000000001923 - 08 - 02 - 0000 Aug 2, 1923 7004210910000000000 ♠ 57 years, 273 days ( 21,091 days ) 30 Coolidge, Calvin Calvin Coolidge 000000001872 - 07 - 04 - 0000 Jul 4, 1872 000000001923 - 08 - 02 - 0000 Aug 2, 1923 7004186550000000000 ♠ 51 years, 29 days 000000001929 - 03 - 04 - 0000 Mar 4, 1929 7004206960000000000 ♠ 56 years, 243 days 01,403 1,403 days ( 7003140300000000000 ♠ 3 years, 307 days ) 000000001933 - 01 - 05 - 0000 Jan 5, 1933 7004220990000000000 ♠ 60 years, 185 days ( 22,099 days ) 31 Hoover, Herbert Herbert Hoover 000000001874 - 08 - 10 - 0000 Aug 10, 1874 000000001929 - 03 - 04 - 0000 Mar 4, 1929 7004199290000000000 ♠ 54 years, 206 days 000000001933 - 03 - 04 - 0000 Mar 4, 1933 7004213900000000000 ♠ 58 years, 206 days 11,553 11,553 days ( 7004115530000000000 ♠ 31 years, 230 days ) 000000001964 - 10 - 20 - 0000 Oct 20, 1964 7004329430000000000 ♠ 90 years, 71 days ( 32,943 days ) 32 Roosevelt, Franklin D. Franklin D. Roosevelt 000000001882 - 01 - 30 - 0000 Jan 30, 1882 000000001933 - 03 - 04 - 0000 Mar 4, 1933 7004186600000000000 ♠ 51 years, 33 days 000000001945 - 04 - 12 - 0000 Apr 12, 1945 7004230820000000000 ♠ 63 years, 72 days 00,000 0 days 000000001945 - 04 - 12 - 0000 Apr 12, 1945 7004230820000000000 ♠ 63 years, 72 days ( 23,082 days ) 33 Truman, Harry S. Harry S. Truman 000000001884 - 05 - 08 - 0000 May 8, 1884 000000001945 - 04 - 12 - 0000 Apr 12, 1945 7004222530000000000 ♠ 60 years, 339 days 000000001953 - 01 - 20 - 0000 Jan 20, 1953 7004250930000000000 ♠ 68 years, 257 days 07,280 7,280 days ( 7003728000000000000 ♠ 19 years, 341 days ) 000000001972 - 12 - 26 - 0000 Dec 26, 1972 7004323730000000000 ♠ 88 years, 232 days ( 32,373 days ) 34 Eisenhower, Dwight D. Dwight D. Eisenhower 000000001890 - 10 - 14 - 0000 Oct 14, 1890 000000001953 - 01 - 20 - 0000 Jan 20, 1953 7004227430000000000 ♠ 62 years, 98 days 000000001961 - 01 - 20 - 0000 Jan 20, 1961 7004256650000000000 ♠ 70 years, 98 days 02,989 2,989 days ( 7003298900000000000 ♠ 8 years, 67 days ) 000000001969 - 03 - 28 - 0000 Mar 28, 1969 7004286540000000000 ♠ 78 years, 165 days ( 28,654 days ) 35 Kennedy, John F. John F. Kennedy 000000001917 - 05 - 29 - 0000 May 29, 1917 000000001961 - 01 - 20 - 0000 Jan 20, 1961 7004159420000000000 ♠ 43 years, 236 days 000000001963 - 11 - 22 - 0000 Nov 22, 1963 7004169780000000000 ♠ 46 years, 177 days 00,000 0 days 000000001963 - 11 - 22 - 0000 Nov 22, 1963 7004169780000000000 ♠ 46 years, 177 days ( 16,978 days ) 36 Johnson, Lyndon B. Lyndon B. Johnson 000000001908 - 08 - 27 - 0000 Aug 27, 1908 000000001963 - 11 - 22 - 0000 Nov 22, 1963 7004201750000000000 ♠ 55 years, 87 days 000000001969 - 01 - 20 - 0000 Jan 20, 1969 7004220610000000000 ♠ 60 years, 146 days 01,463 1,463 days ( 7003146300000000000 ♠ 4 years, 2 days ) 000000001973 - 01 - 22 - 0000 Jan 22, 1973 7004235240000000000 ♠ 64 years, 148 days ( 23,524 days ) 37 Nixon, Richard Richard Nixon 000000001913 - 01 - 09 - 0000 Jan 9, 1913 000000001969 - 01 - 20 - 0000 Jan 20, 1969 7004204650000000000 ♠ 56 years, 11 days 000000001974 - 08 - 09 - 0000 Aug 9, 1974 7004224920000000000 ♠ 61 years, 212 days 07,196 7,196 days ( 7003719600000000000 ♠ 19 years, 256 days ) 000000001994 - 04 - 22 - 0000 Apr 22, 1994 7004296880000000000 ♠ 81 years, 103 days ( 29,688 days ) 38 Ford, Gerald Gerald Ford 000000001913 - 07 - 14 - 0000 Jul 14, 1913 000000001974 - 08 - 09 - 0000 Aug 9, 1974 7004223060000000000 ♠ 61 years, 26 days 000000001977 - 01 - 20 - 0000 Jan 20, 1977 7004232010000000000 ♠ 63 years, 190 days 10,932 10,932 days ( 7004109320000000000 ♠ 29 years, 340 days ) 000000002006 - 12 - 26 - 0000 Dec 26, 2006 7004341330000000000 ♠ 93 years, 165 days ( 34,133 days ) 39 Carter, Jimmy Jimmy Carter 000000001924 - 10 - 01 - 0000 Oct 1, 1924 000000001977 - 01 - 20 - 0000 Jan 20, 1977 7004191040000000000 ♠ 52 years, 111 days 000000001981 - 01 - 20 - 0000 Jan 20, 1981 7004205650000000000 ♠ 56 years, 111 days 13,440 13,440 days ( 7004134400000000000 ♠ 36 years, 291 days ) 2017 - 11 - 7 7004340050000000000 ♠ 93 years, 37 days ( 34,005 days ) 40 Reagan, Ronald Ronald Reagan 000000001911 - 02 - 06 - 0000 Feb 6, 1911 000000001981 - 01 - 20 - 0000 Jan 20, 1981 7004255510000000000 ♠ 69 years, 349 days 000000001989 - 01 - 20 - 0000 Jan 20, 1989 7004284730000000000 ♠ 77 years, 349 days 05,615 5,615 days ( 7003561500000000000 ♠ 15 years, 137 days ) 000000002004 - 06 - 05 - 0000 Jun 5, 2004 7004340880000000000 ♠ 93 years, 120 days ( 34,088 days ) 41 Bush, George H.W. George H.W. Bush 000000001924 - 06 - 12 - 0000 Jun 12, 1924 000000001989 - 01 - 20 - 0000 Jan 20, 1989 7004235980000000000 ♠ 64 years, 222 days 000000001993 - 01 - 20 - 0000 Jan 20, 1993 7004250590000000000 ♠ 68 years, 222 days 09,057 9,057 days ( 7003905700000000000 ♠ 24 years, 291 days ) 2017 - 11 - 7 7004341160000000000 ♠ 93 years, 148 days ( 34,116 days ) 42 Clinton, Bill Bill Clinton 000000001946 - 08 - 19 - 0000 Aug 19, 1946 000000001993 - 01 - 20 - 0000 Jan 20, 1993 7004169560000000000 ♠ 46 years, 154 days 000000002001 - 01 - 20 - 0000 Jan 20, 2001 7004198780000000000 ♠ 54 years, 154 days 06,135 6,135 days ( 7003613500000000000 ♠ 16 years, 291 days ) 2017 - 11 - 7 7004260130000000000 ♠ 71 years, 80 days ( 26,013 days ) 43 Bush, George W. George W. Bush 000000001946 - 07 - 06 - 0000 Jul 6, 1946 000000002001 - 01 - 20 - 0000 Jan 20, 2001 7004199220000000000 ♠ 54 years, 198 days 000000002009 - 01 - 20 - 0000 Jan 20, 2009 7004228440000000000 ♠ 62 years, 198 days 03,213 3,213 days ( 7003321300000000000 ♠ 8 years, 291 days ) 2017 - 11 - 7 7004260570000000000 ♠ 71 years, 124 days ( 26,057 days ) 44 Obama, Barack Barack Obama 000000001961 - 08 - 04 - 0000 Aug 4, 1961 000000002009 - 01 - 20 - 0000 Jan 20, 2009 7004173360000000000 ♠ 47 years, 169 days 000000002017 - 01 - 20 - 0000 Jan 20, 2017 7004202580000000000 ♠ 55 years, 169 days 00, 134291 291 days 2017 - 11 - 7 7004205490000000000 ♠ 56 years, 95 days ( 20,549 days ) 45 Trump, Donald Donald Trump 000000001946 - 06 - 14 - 0000 Jun 14, 1946 000000002017 - 01 - 20 - 0000 Jan 20, 2017 7004257880000000000 ♠ 70 years, 220 days 2017 - 11 - 7 7004288540000000000 ♠ 78 years, 364 days 24,782 2017 - 11 - 7 7004260790000000000 ♠ 71 years, 146 days ( 26,079 days ) # President Birth date Presidency start date Age at start date Presidency end date Age at end date Post-presidency timespan Death date Lifespan Notes ^ Jump up to : Birthdate as changed to New Style. ^ Jump up to : Died in office. ^ Jump up to : Cleveland was retired for 1,461 days between his two terms ( 1889 -- 1893 ), and then another 4,129 days from the end of his 2nd term ( 1897 ) until his death ( 1908 ). Jump up ^ Resigned from office. ^ Jump up to : Ongoing. Timeline of oldest living presidents See also : Living Presidents of the United States Of the 44 persons who have served as president, 24 have become the oldest such individual of their time. Herbert Hoover became the oldest living president ( while still president himself ) when Calvin Coolidge died in January 1933, and retained this distinction until his death 31 years later. Lyndon B. Johnson became the oldest living president upon the death of Harry S. Truman in December 1972 but held this distinction for only 27 days. On three occasions the oldest living president lost this distinction not by his death, but by the election of a president who was older. Theodore Roosevelt ( born 1858 ) lost this distinction when William Taft ( born 1857 ) was inaugurated, then four years later Taft lost it when Woodrow Wilson ( born 1856 ) was inaugurated. More recently, Richard Nixon ( born 1913 ) ceased being the oldest living president when Ronald Reagan ( born 1911 ) was inaugurated. Furthermore, although Theodore Roosevelt was the youngest ever to become both the oldest living president ( at age 50 ) and a former president ( at age 51 ), he was the only living president or former president by the end of his term. Consequently, Taft was the oldest living president twice : first during his presidency ( having succeeded the younger Roosevelt ), and a second time after Wilson ( his successor as president but an older man ) died. Gerald Ford was the oldest individual to acquire this distinction at the age of 90. On seven occasions, the oldest living president has acquired this distinction during his term in office. In the cases of John Adams, Ulysses S. Grant, Theodore Roosevelt, Herbert Hoover and Richard Nixon, this happened at the same time as their becoming the only living president ; in the cases of Andrew Jackson and Benjamin Harrison, the only other living president at the time was a younger predecessor ( John Quincy Adams and Grover Cleveland respectively ). President Became oldest living president Ceased to be oldest living president Age at start date Age at end date Duration ( years, days ) Duration ( days ) Washington, George George Washington 000000001789 - 04 - 30 - 0000 April 30, 1789 000000001799 - 12 - 14 - 0000 December 14, 1799 7004208870000000000 ♠ 57 years, 67 days 7004247670000000000 ♠ 67 years, 295 days 7003388000000000000 ♠ 10 years, 228 days 03,880 3,880 days Adams, John John Adams 000000001799 - 12 - 14 - 0000 December 14, 1799 000000001826 - 07 - 04 - 0000 July 4, 1826 7004234210000000000 ♠ 64 years, 45 days 7004331190000000000 ♠ 90 years, 247 days 7003969800000000000 ♠ 26 years, 202 days 09,698 9,698 days Madison, James James Madison 000000001826 - 07 - 04 - 0000 July 4, 1826 000000001836 - 06 - 28 - 0000 June 28, 1836 7004275030000000000 ♠ 75 years, 110 days 7004311500000000000 ♠ 85 years, 104 days 7003364700000000000 ♠ 9 years, 360 days 03,647 3,647 days Jackson, Andrew Andrew Jackson 000000001836 - 06 - 28 - 0000 June 28, 1836 000000001845 - 06 - 08 - 0000 June 8, 1845 7004253070000000000 ♠ 69 years, 105 days 7004285740000000000 ♠ 78 years, 85 days 7003326700000000000 ♠ 8 years, 345 days 03,267 3,267 days Adams, John Quincy John Quincy Adams 000000001845 - 06 - 08 - 0000 June 8, 1845 000000001848 - 02 - 23 - 0000 February 23, 1848 7004284560000000000 ♠ 77 years, 332 days 7004294460000000000 ♠ 80 years, 227 days 7002990000000000000 ♠ 2 years, 260 days 00,990 990 days Van Buren, Martin Martin Van Buren 000000001848 - 02 - 23 - 0000 February 23, 1848 000000001862 - 07 - 24 - 0000 July 24, 1862 7004238200000000000 ♠ 65 years, 80 days 7004290850000000000 ♠ 79 years, 231 days 7003526500000000000 ♠ 14 years, 151 days 05,265 5,265 days Buchanan, James James Buchanan 000000001862 - 07 - 24 - 0000 July 24, 1862 000000001868 - 06 - 01 - 0000 June 1, 1868 7004260240000000000 ♠ 71 years, 92 days 7004281630000000000 ♠ 77 years, 39 days 7003213900000000000 ♠ 5 years, 313 days 02,139 2,139 days Fillmore, Millard Millard Fillmore 000000001868 - 06 - 01 - 0000 June 1, 1868 000000001874 - 03 - 08 - 0000 March 8, 1874 7004249820000000000 ♠ 68 years, 146 days 7004270880000000000 ♠ 74 years, 60 days 7003210600000000000 ♠ 5 years, 280 days 02,106 2,106 days Johnson, Andrew Andrew Johnson 000000001874 - 03 - 08 - 0000 March 8, 1874 000000001875 - 07 - 31 - 0000 July 31, 1875 7004238100000000000 ♠ 65 years, 69 days 7004243200000000000 ♠ 66 years, 214 days 7002510000000000000 ♠ 1 year, 145 days 00,510 510 days Grant, Ulysses S. Ulysses S. Grant 000000001875 - 07 - 31 - 0000 July 31, 1875 000000001885 - 07 - 23 - 0000 July 23, 1885 7004194530000000000 ♠ 53 years, 95 days 7004230980000000000 ♠ 63 years, 87 days 7003364500000000000 ♠ 9 years, 357 days 03,645 3,645 days Hayes, Rutherford B. Rutherford B. Hayes 000000001885 - 07 - 23 - 0000 July 23, 1885 000000001893 - 01 - 17 - 0000 January 17, 1893 7004229380000000000 ♠ 62 years, 292 days 7004256730000000000 ♠ 70 years, 105 days 7003273500000000000 ♠ 7 years, 178 days 02,735 2,735 days Harrison, Benjamin Benjamin Harrison 000000001893 - 01 - 17 - 0000 January 17, 1893 000000001901 - 03 - 13 - 0000 March 13, 1901 7004217000000000000 ♠ 59 years, 150 days 7004246760000000000 ♠ 67 years, 205 days 7003297600000000000 ♠ 8 years, 55 days 02,976 2,976 days Cleveland, Grover Grover Cleveland 000000001901 - 03 - 13 - 0000 March 13, 1901 000000001908 - 06 - 24 - 0000 June 24, 1908 7004233700000000000 ♠ 63 years, 360 days 7004260300000000000 ♠ 71 years, 98 days 7003266000000000000 ♠ 7 years, 103 days 02,660 2,660 days Roosevelt, Theodore Theodore Roosevelt 000000001908 - 06 - 24 - 0000 June 24, 1908 000000001909 - 03 - 04 - 0000 March 4, 1909 7004181370000000000 ♠ 49 years, 241 days 7004183900000000000 ♠ 50 years, 128 days 7002253000000000000 ♠ 253 days 00,253 253 days Taft, William Howard William Howard Taft 000000001909 - 03 - 04 - 0000 March 4, 1909 000000001913 - 03 - 04 - 0000 March 4, 1913 7004187970000000000 ♠ 51 years, 170 days 7004202580000000000 ♠ 55 years, 170 days 7003146100000000000 ♠ 4 years, 0 days 01,461 1,461 days Wilson, Woodrow Woodrow Wilson 000000001913 - 03 - 04 - 0000 March 4, 1913 000000001924 - 02 - 03 - 0000 February 3, 1924 7004205190000000000 ♠ 56 years, 66 days 7004245070000000000 ♠ 67 years, 37 days 7003398800000000000 ♠ 10 years, 336 days 03,988 3,988 days Taft, William Howard William Howard Taft 000000001924 - 02 - 03 - 0000 February 3, 1924 000000001930 - 03 - 08 - 0000 March 8, 1930 7004242460000000000 ♠ 66 years, 141 days 7004264710000000000 ♠ 72 years, 174 days 7003222500000000000 ♠ 6 years, 33 days 02,225 2,225 days Coolidge, Calvin Calvin Coolidge 000000001930 - 03 - 08 - 0000 March 8, 1930 000000001933 - 01 - 05 - 0000 January 5, 1933 7004210650000000000 ♠ 57 years, 247 days 7004220990000000000 ♠ 60 years, 185 days 7003103400000000000 ♠ 2 years, 303 days 01,034 1,034 days Hoover, Herbert Herbert Hoover 000000001933 - 01 - 05 - 0000 January 5, 1933 000000001964 - 10 - 20 - 0000 October 20, 1964 7004213320000000000 ♠ 58 years, 148 days 7004329430000000000 ♠ 90 years, 71 days 7004116110000000000 ♠ 31 years, 289 days 11,611 11,611 days Truman, Harry S. Harry S. Truman 000000001964 - 10 - 20 - 0000 October 20, 1964 000000001972 - 12 - 26 - 0000 December 26, 1972 7004293840000000000 ♠ 80 years, 165 days 7004323730000000000 ♠ 88 years, 232 days 7003298900000000000 ♠ 8 years, 67 days 02,989 2,989 days Johnson, Lyndon B. Lyndon B. Johnson 000000001972 - 12 - 26 - 0000 December 26, 1972 000000001973 - 01 - 22 - 0000 January 22, 1973 7004234970000000000 ♠ 64 years, 121 days 7004235240000000000 ♠ 64 years, 148 days 7001270000000000000 ♠ 27 days 00,027 27 days Nixon, Richard Richard Nixon 000000001973 - 01 - 22 - 0000 January 22, 1973 000000001981 - 01 - 20 - 0000 January 20, 1981 7004219280000000000 ♠ 60 years, 13 days 7004248480000000000 ♠ 68 years, 11 days 7003292000000000000 ♠ 7 years, 364 days 02,920 2,920 days Reagan, Ronald Ronald Reagan 000000001981 - 01 - 20 - 0000 January 20, 1981 000000002004 - 06 - 05 - 0000 June 5, 2004 7004255510000000000 ♠ 69 years, 349 days 7004340880000000000 ♠ 93 years, 120 days 7003853700000000000 ♠ 23 years, 137 days 08,537 8,537 days Ford, Gerald Gerald Ford 000000002004 - 06 - 05 - 0000 June 5, 2004 000000002006 - 12 - 26 - 0000 December 26, 2006 7004331990000000000 ♠ 90 years, 327 days 7004341330000000000 ♠ 93 years, 165 days 7002934000000000000 ♠ 2 years, 204 days 00,934 934 days Bush, George H.W. George H.W. Bush 000000002006 - 12 - 26 - 0000 December 26, 2006 Current 7004301470000000000 ♠ 82 years, 197 days Current 7003396900000000000 ♠ 10 years, 316 days 03,969 3,969 days President Became oldest living president Ceased to be oldest living president Age at start date Age at end date Duration ( years, days ) Duration ( days ) Sources Frank Freidel and Hugh S. Sidey, `` The Presidents of the United States ''. The White House. Robert S. Summers, `` POTUS : Presidents of the United States ''. Internet Public Library. 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Question: who was the oldest us president in office
Answer: Ronald Reagan