<P> Born on February 6, 1911, Ronald Reagan was older than four of his predecessors, the greatest number to date: Richard Nixon (1 year, 11 months, and 7 days); Gerald Ford (2 years, 5 months, and 8 days); John F. Kennedy (6 years, 3 months, and 23 days); and Jimmy Carter (13 years, 7 months, and 25 days). </P> <P> Three presidents--Donald Trump, George W. Bush, and Bill Clinton--were born in 1946 (all within the span of 9 weeks). This is the only calendar year in which three presidents have been born . Two presidents--James K. Polk and Warren G. Harding--were born on November 2 (70 years apart). This is the only day of the year having the birthday of multiple presidents . </P> <P> The oldest living U.S. president is George H.W. Bush, born June 12, 1924 (age 93 years, 346 days). On November 25, 2017, he also became the longest - lived president, surpassing the lifespan of Gerald Ford, who died at the age of 93 years, 165 days . The second oldest living president, Jimmy Carter, has the distinction of having the longest post-presidency in U.S. history, currently at 37 years, 124 days . He surpassed the previous record, held by Herbert Hoover (31 years, 230 days) on September 7, 2012 . The youngest living president is Barack Obama, born August 4, 1961 (age 56 years, 293 days). </P> <P> 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 of cholera at the age of 53 years, 225 days; only 103 days after leaving office . </P>

Who was the longest living president after leaving office