<P> 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 . </P> <P> 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). </P> <Table> <Tr> <Th> President </Th> <Th> Became oldest living president </Th> <Th> Ceased to be oldest living president </Th> <Th> Age at start date </Th> <Th> Age at end date </Th> <Th> Duration (years, days) </Th> <Th> Duration (days) </Th> </Tr> <Tr> <Td> Washington, George George Washington </Td> <Td> 000000001789 - 04 - 30 - 0000 April 30, 1789 </Td> <Td> 000000001799 - 12 - 14 - 0000 December 14, 1799 </Td> <Td> 7004208870000000000 ♠ 57 years, 67 days </Td> <Td> 7004247670000000000 ♠ 67 years, 295 days </Td> <Td> 7003388000000000000 ♠ 10 years, 228 days </Td> <Td> 03,880 3,880 days </Td> </Tr> <Tr> <Td> Adams, John John Adams </Td> <Td> 000000001799 - 12 - 14 - 0000 December 14, 1799 </Td> <Td> 000000001826 - 07 - 04 - 0000 July 4, 1826 </Td> <Td> 7004234210000000000 ♠ 64 years, 45 days </Td> <Td> 7004331190000000000 ♠ 90 years, 247 days </Td> <Td> 7003969800000000000 ♠ 26 years, 202 days </Td> <Td> 09,698 9,698 days </Td> </Tr> <Tr> <Td> Madison, James James Madison </Td> <Td> 000000001826 - 07 - 04 - 0000 July 4, 1826 </Td> <Td> 000000001836 - 06 - 28 - 0000 June 28, 1836 </Td> <Td> 7004275030000000000 ♠ 75 years, 110 days </Td> <Td> 7004311500000000000 ♠ 85 years, 104 days </Td> <Td> 7003364700000000000 ♠ 9 years, 360 days </Td> <Td> 03,647 3,647 days </Td> </Tr> <Tr> <Td> Jackson, Andrew Andrew Jackson </Td> <Td> 000000001836 - 06 - 28 - 0000 June 28, 1836 </Td> <Td> 000000001845 - 06 - 08 - 0000 June 8, 1845 </Td> <Td> 7004253070000000000 ♠ 69 years, 105 days </Td> <Td> 7004285740000000000 ♠ 78 years, 85 days </Td> <Td> 7003326700000000000 ♠ 8 years, 345 days </Td> <Td> 03,267 3,267 days </Td> </Tr> <Tr> <Td> Adams, John Quincy John Quincy Adams </Td> <Td> 000000001845 - 06 - 08 - 0000 June 8, 1845 </Td> <Td> 000000001848 - 02 - 23 - 0000 February 23, 1848 </Td> <Td> 7004284560000000000 ♠ 77 years, 332 days </Td> <Td> 7004294460000000000 ♠ 80 years, 227 days </Td> <Td> 7002990000000000000 ♠ 2 years, 260 days </Td> <Td> 00,990 990 days </Td> </Tr> <Tr> <Td> Van Buren, Martin Martin Van Buren </Td> <Td> 000000001848 - 02 - 23 - 0000 February 23, 1848 </Td> <Td> 000000001862 - 07 - 24 - 0000 July 24, 1862 </Td> <Td> 7004238200000000000 ♠ 65 years, 80 days </Td> <Td> 7004290850000000000 ♠ 79 years, 231 days </Td> <Td> 7003526500000000000 ♠ 14 years, 151 days </Td> <Td> 05,265 5,265 days </Td> </Tr> <Tr> <Td> Buchanan, James James Buchanan </Td> <Td> 000000001862 - 07 - 24 - 0000 July 24, 1862 </Td> <Td> 000000001868 - 06 - 01 - 0000 June 1, 1868 </Td> <Td> 7004260240000000000 ♠ 71 years, 92 days </Td> <Td> 7004281630000000000 ♠ 77 years, 39 days </Td> <Td> 7003213900000000000 ♠ 5 years, 313 days </Td> <Td> 02,139 2,139 days </Td> </Tr> <Tr> <Td> Fillmore, Millard Millard Fillmore </Td> <Td> 000000001868 - 06 - 01 - 0000 June 1, 1868 </Td> <Td> 000000001874 - 03 - 08 - 0000 March 8, 1874 </Td> <Td> 7004249820000000000 ♠ 68 years, 146 days </Td> <Td> 7004270880000000000 ♠ 74 years, 60 days </Td> <Td> 7003210600000000000 ♠ 5 years, 280 days </Td> <Td> 02,106 2,106 days </Td> </Tr> <Tr> <Td> Johnson, Andrew Andrew Johnson </Td> <Td> 000000001874 - 03 - 08 - 0000 March 8, 1874 </Td> <Td> 000000001875 - 07 - 31 - 0000 July 31, 1875 </Td> <Td> 7004238100000000000 ♠ 65 years, 69 days </Td> <Td> 7004243200000000000 ♠ 66 years, 214 days </Td> <Td> 7002510000000000000 ♠ 1 year, 145 days </Td> <Td> 00,510 510 days </Td> </Tr> <Tr> <Td> Grant, Ulysses S. Ulysses S. Grant </Td> <Td> 000000001875 - 07 - 31 - 0000 July 31, 1875 </Td> <Td> 000000001885 - 07 - 23 - 0000 July 23, 1885 </Td> <Td> 7004194530000000000 ♠ 53 years, 95 days </Td> <Td> 7004230980000000000 ♠ 63 years, 87 days </Td> <Td> 7003364500000000000 ♠ 9 years, 357 days </Td> <Td> 03,645 3,645 days </Td> </Tr> <Tr> <Td> Hayes, Rutherford B. Rutherford B. Hayes </Td> <Td> 000000001885 - 07 - 23 - 0000 July 23, 1885 </Td> <Td> 000000001893 - 01 - 17 - 0000 January 17, 1893 </Td> <Td> 7004229380000000000 ♠ 62 years, 292 days </Td> <Td> 7004256730000000000 ♠ 70 years, 105 days </Td> <Td> 7003273500000000000 ♠ 7 years, 178 days </Td> <Td> 02,735 2,735 days </Td> </Tr> <Tr> <Td> Harrison, Benjamin Benjamin Harrison </Td> <Td> 000000001893 - 01 - 17 - 0000 January 17, 1893 </Td> <Td> 000000001901 - 03 - 13 - 0000 March 13, 1901 </Td> <Td> 7004217000000000000 ♠ 59 years, 150 days </Td> <Td> 7004246760000000000 ♠ 67 years, 205 days </Td> <Td> 7003297600000000000 ♠ 8 years, 55 days </Td> <Td> 02,976 2,976 days </Td> </Tr> <Tr> <Td> Cleveland, Grover Grover Cleveland </Td> <Td> 000000001901 - 03 - 13 - 0000 March 13, 1901 </Td> <Td> 000000001908 - 06 - 24 - 0000 June 24, 1908 </Td> <Td> 7004233700000000000 ♠ 63 years, 360 days </Td> <Td> 7004260300000000000 ♠ 71 years, 98 days </Td> <Td> 7003266000000000000 ♠ 7 years, 103 days </Td> <Td> 02,660 2,660 days </Td> </Tr> <Tr> <Td> Roosevelt, Theodore Theodore Roosevelt </Td> <Td> 000000001908 - 06 - 24 - 0000 June 24, 1908 </Td> <Td> 000000001909 - 03 - 04 - 0000 March 4, 1909 </Td> <Td> 7004181370000000000 ♠ 49 years, 241 days </Td> <Td> 7004183900000000000 ♠ 50 years, 128 days </Td> <Td> 7002253000000000000 ♠ 253 days </Td> <Td> 00,253 253 days </Td> </Tr> <Tr> <Td> Taft, William Howard William Howard Taft </Td> <Td> 000000001909 - 03 - 04 - 0000 March 4, 1909 </Td> <Td> 000000001913 - 03 - 04 - 0000 March 4, 1913 </Td> <Td> 7004187970000000000 ♠ 51 years, 170 days </Td> <Td> 7004202580000000000 ♠ 55 years, 170 days </Td> <Td> 7003146100000000000 ♠ 4 years, 0 days </Td> <Td> 01,461 1,461 days </Td> </Tr> <Tr> <Td> Wilson, Woodrow Woodrow Wilson </Td> <Td> 000000001913 - 03 - 04 - 0000 March 4, 1913 </Td> <Td> 000000001924 - 02 - 03 - 0000 February 3, 1924 </Td> <Td> 7004205190000000000 ♠ 56 years, 66 days </Td> <Td> 7004245070000000000 ♠ 67 years, 37 days </Td> <Td> 7003398800000000000 ♠ 10 years, 336 days </Td> <Td> 03,988 3,988 days </Td> </Tr> <Tr> <Td> Taft, William Howard William Howard Taft </Td> <Td> 000000001924 - 02 - 03 - 0000 February 3, 1924 </Td> <Td> 000000001930 - 03 - 08 - 0000 March 8, 1930 </Td> <Td> 7004242460000000000 ♠ 66 years, 141 days </Td> <Td> 7004264710000000000 ♠ 72 years, 174 days </Td> <Td> 7003222500000000000 ♠ 6 years, 33 days </Td> <Td> 02,225 2,225 days </Td> </Tr> <Tr> <Td> Coolidge, Calvin Calvin Coolidge </Td> <Td> 000000001930 - 03 - 08 - 0000 March 8, 1930 </Td> <Td> 000000001933 - 01 - 05 - 0000 January 5, 1933 </Td> <Td> 7004210650000000000 ♠ 57 years, 247 days </Td> <Td> 7004220990000000000 ♠ 60 years, 185 days </Td> <Td> 7003103400000000000 ♠ 2 years, 303 days </Td> <Td> 01,034 1,034 days </Td> </Tr> <Tr> <Td> Hoover, Herbert Herbert Hoover </Td> <Td> 000000001933 - 01 - 05 - 0000 January 5, 1933 </Td> <Td> 000000001964 - 10 - 20 - 0000 October 20, 1964 </Td> <Td> 7004213320000000000 ♠ 58 years, 148 days </Td> <Td> 7004329430000000000 ♠ 90 years, 71 days </Td> <Td> 7004116110000000000 ♠ 31 years, 289 days </Td> <Td> 11,611 11,611 days </Td> </Tr> <Tr> <Td> Truman, Harry S. Harry S. Truman </Td> <Td> 000000001964 - 10 - 20 - 0000 October 20, 1964 </Td> <Td> 000000001972 - 12 - 26 - 0000 December 26, 1972 </Td> <Td> 7004293840000000000 ♠ 80 years, 165 days </Td> <Td> 7004323730000000000 ♠ 88 years, 232 days </Td> <Td> 7003298900000000000 ♠ 8 years, 67 days </Td> <Td> 02,989 2,989 days </Td> </Tr> <Tr> <Td> Johnson, Lyndon B. Lyndon B. Johnson </Td> <Td> 000000001972 - 12 - 26 - 0000 December 26, 1972 </Td> <Td> 000000001973 - 01 - 22 - 0000 January 22, 1973 </Td> <Td> 7004234970000000000 ♠ 64 years, 121 days </Td> <Td> 7004235240000000000 ♠ 64 years, 148 days </Td> <Td> 7001270000000000000 ♠ 27 days </Td> <Td> 00,027 27 days </Td> </Tr> <Tr> <Td> Nixon, Richard Richard Nixon </Td> <Td> 000000001973 - 01 - 22 - 0000 January 22, 1973 </Td> <Td> 000000001981 - 01 - 20 - 0000 January 20, 1981 </Td> <Td> 7004219280000000000 ♠ 60 years, 13 days </Td> <Td> 7004248480000000000 ♠ 68 years, 11 days </Td> <Td> 7003292000000000000 ♠ 7 years, 364 days </Td> <Td> 02,920 2,920 days </Td> </Tr> <Tr> <Td> Reagan, Ronald Ronald Reagan </Td> <Td> 000000001981 - 01 - 20 - 0000 January 20, 1981 </Td> <Td> 000000002004 - 06 - 05 - 0000 June 5, 2004 </Td> <Td> 7004255510000000000 ♠ 69 years, 349 days </Td> <Td> 7004340880000000000 ♠ 93 years, 120 days </Td> <Td> 7003853700000000000 ♠ 23 years, 137 days </Td> <Td> 08,537 8,537 days </Td> </Tr> <Tr> <Td> Ford, Gerald Gerald Ford </Td> <Td> 000000002004 - 06 - 05 - 0000 June 5, 2004 </Td> <Td> 000000002006 - 12 - 26 - 0000 December 26, 2006 </Td> <Td> 7004331990000000000 ♠ 90 years, 327 days </Td> <Td> 7004341330000000000 ♠ 93 years, 165 days </Td> <Td> 7002934000000000000 ♠ 2 years, 204 days </Td> <Td> 00,934 934 days </Td> </Tr> <Tr> <Td> Bush, George H.W. George H.W. Bush </Td> <Td> 000000002006 - 12 - 26 - 0000 December 26, 2006 </Td> <Td> Current </Td> <Td> 7004301470000000000 ♠ 82 years, 197 days </Td> <Td> Current </Td> <Td> 7003396800000000000 ♠ 10 years, 315 days </Td> <Td> 03,968 3,968 days </Td> </Tr> <Tr> <Th> President </Th> <Th> Became oldest living president </Th> <Th> Ceased to be oldest living president </Th> <Th> Age at start date </Th> <Th> Age at end date </Th> <Th> Duration (years, days) </Th> <Th> Duration (days) </Th> </Tr> </Table> <Tr> <Th> President </Th> <Th> Became oldest living president </Th> <Th> Ceased to be oldest living president </Th> <Th> Age at start date </Th> <Th> Age at end date </Th> <Th> Duration (years, days) </Th> <Th> Duration (days) </Th> </Tr>

Who is the oldest living president of the us