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. Where the president is still living, their lifespan is calculated up to . 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 the ''oldest living''.

Age of presidents

The median age at inauguration of incoming U.S. presidents is 55 years. The specific years and days median is 55 years and 355 days, which falls midway between how old Grover Cleveland was in 1893 and Richard Nixon was in 1969. The youngest person to assume the presidency was Theodore Roosevelt, who, at the age of 42, succeeded to the office after the assassination of William McKinley. The youngest to become president by election was John F. Kennedy, who was inaugurated at age 43. The oldest person to assume the presidency was Joe Biden, who took the presidential oath of office two months after turning 78. Assassinated at age 46, John F. Kennedy was the youngest president at the end of his tenure, and his lifespan was the shortest of any president. At age 50, Theodore Roosevelt was the youngest person to become a former president. The oldest president at the end of his tenure was Ronald Reagan at 77; this distinction will eventually devolve upon Joe Biden, who was older when he took office than Reagan was when he left office. The president born after the greatest number of his successors is John F. Kennedy. He was born after four of his successors: Lyndon B. Johnson (); Ronald Reagan (); Richard Nixon (); and Gerald Ford (). On the other extreme, Ronald Reagan and Joe Biden were each born before four of their predecessors. Reagan was born before Richard Nixon (), Gerald Ford (), John F. Kennedy (), and Jimmy Carter (). Biden was born before Donald Trump (); George W. Bush (); Bill Clinton (); and Barack Obama (). James K. Polk had the shortest retirement of any president, dying barely three months after leaving office at age 53 (the youngest president to die of natural causes). Jimmy Carter's retirement, now 40 years, is the longest in American presidential history. At age 96, Jimmy Carter is also the oldest living president as well as the nation's longest-lived president. The youngest living president is Barack Obama, age 59. Altogether, six U.S. presidents have lived into their 90s. The first to do so, John Adams, was the longest-lived president for nearly two centuries, from 1803 until Ronald Reagan surpassed his lifespan, in October 2001. The six presidents, arranged by lifespan are: Carter cropped.jpg|
Jimmy Carter
Born October 1, 1924
(age )
George H. W. Bush presidential portrait (cropped 2).jpg|
George H. W. Bush
June 12, 1924 – November 30, 2018
(aged )
Gerald Ford (1974) (cropped).jpg|alt=President Gerald R. Ford 1974.|
Gerald Ford
July 14, 1913 – December 26, 2006
(aged )
Official Portrait of President Reagan 1981-cropped.jpg|
Ronald Reagan
February 6, 1911 – June 5, 2004
(aged )
Gilbert Stuart, John Adams, c. 1800-1815, NGA 42933.jpg|
John Adams
October 30, 1735 – July 4, 1826
(aged )
President Hoover portrait.jpg|alt=President Hoover portrait.|
Herbert Hoover
August 10, 1874 – October 20, 1964
(aged )

Presidential age-related data


Oldest living

Of the 45 people who have served as president, 25 have become the oldest such individual of their time, with one, William Howard Taft, doing so twice. Herbert Hoover held the distinction for the longest period of any, from the death of Calvin Coolidge in January 1933 until his own death 31 years later. Lyndon B. Johnson held it for the shortest, from the death of Harry S. Truman in December 1972 until his own death only 27 days later. Theodore Roosevelt, at age 49, is the youngest individual to become the oldest living president; Jimmy Carter became the oldest to acquire the distinction at age 94. (Nine of these individuals have also had the distinction of being the oldest living U.S. vice president: John Adams, Martin Van Buren, Millard Fillmore, Andrew Johnson, Harry S. Truman, Lyndon B. Johnson, Richard Nixon, Gerald Ford, and George H. W. Bush.) On three occasions the oldest living president lost the distinction not by his death, but by the inauguration of a president who was older: Theodore Roosevelt (born 1858) to William Howard Taft (born 1857) in 1909; Taft to Woodrow Wilson (born 1856) in 1913 (though Taft later regained the honor, as he outlived Wilson); and Richard Nixon (born 1913) to Ronald Reagan (born 1911) in 1981. Eleven presidents have held the distinction while in office. In the cases of George Washington, William Howard Taft, Woodrow Wilson, and Ronald Reagan this occurred upon their inauguration as they were older than their living predecessors (or, in Washington's case, had no predecessors). 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. By contrast, the president who acquired the distinction furthest from his time in office was Jimmy Carter, who had been retired for when he became the oldest living president, upon the death of George H. W. Bush.

Graphical representation

This is a graphical lifespan timeline of the presidents of the United States. They are listed in order of office, with Grover Cleveland listed in the order of his first presidency.
The following chart shows presidents by their age (living presidents in green), with the years of their presidency in blue.



* 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. {{DEFAULTSORT:presidents of the United States by age United States, Presidents Age Category:United States presidents and death