List of presidents of the United States by age

Oldest living United States presidentlongest-lived presidentlongest-lived U.S. presidentyoungest personoldestyoungest president20th president of the USbe elected to the office before reaching the age of 50List of United States Presidents by longevitylongest-lived US president
This is a list of presidents of the United States by age.wikipedia
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Donald Trump

TrumpPresident TrumpPresident Donald Trump
The youngest person to assume the office was Theodore Roosevelt, who became president at the age of 42 years, 332 days, following William McKinley's assassination; the oldest was Donald Trump, who was 70 years, 238 days old at his inauguration.
He became the oldest first-term U.S. president, and the first one without prior military or government service.

Jimmy Carter

CarterPresident CarterPresident Jimmy Carter
On the other extreme, Ronald Reagan was born before four of his predecessors: Richard Nixon (1 year, 11 months, 12 days); Gerald Ford (2 years, 5 months, 9 days); John F. Kennedy (6 years, 3 months, 24 days); and Jimmy Carter (13 years, 8 months, 1 day).
The earliest-serving of the five living U.S. presidents, Carter is the longest-lived president, the longest-retired president, the first to live forty years after their inauguration, and the first to reach the age of 95.

John F. Kennedy

KennedyPresident KennedyJohn Kennedy
The youngest person to be elected president was John F. Kennedy, at 43 years, 174 days of age on election day; the oldest was Ronald Reagan, who was 73 years, 292 days old at the time of his election to a second term.
Kennedy became the youngest person (43) ever elected to the presidency, though Theodore Roosevelt was a year younger at 42 when he automatically assumed the office after William McKinley's assassination in 1901.

James K. Polk

James PolkJames Knox PolkPolk
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, 238 days; only 103 days after leaving office.
When he took office on March 4, 1845, Polk, at 49, became the youngest president to that point.

Ronald Reagan

ReaganRonald W. ReaganPresident Reagan
The youngest person to be elected president was John F. Kennedy, at 43 years, 174 days of age on election day; the oldest was Ronald Reagan, who was 73 years, 292 days old at the time of his election to a second term. The first to do so, John Adams, held the distinction of being the longest-lived president for nearly two centuries, from 1803 until Ronald Reagan surpassed his lifespan in October 2001.
At the time of his death, Reagan was the longest-lived president in U.S. history, having lived 93 years and 120 days (2 years, 8 months, and 23 days longer than John Adams, whose record he surpassed).

Gerald Ford

Gerald R. FordFordGerald R. Ford, Jr.
He was born after four of his successors: Lyndon Johnson (8 years, 9 months, 7 days); Ronald Reagan (6 years, 3 months, 24 days); Richard Nixon (4 years, 4 months, 17 days); and Gerald Ford (3 years, 10 months, 20 days).
On November 12, 2006, Ford surpassed the 93 years and 120 days lifespan of Ronald Reagan (who died on June 5, 2004), thus becoming the longest-lived president in American history.

George H. W. Bush

George H.W. BushBushGeorge Bush
On March 22, 2019, he also became the nation's longest-lived president, surpassing the lifespan of George H. W. Bush, who died at the age of 94 years, 194 days.
At the time of his death he was the longest-lived U.S. president, a distinction now held by Jimmy Carter.

John Tyler

TylerPresident TylerJohn Tyler, Jr.
When he took office, Tyler, at 51, became the youngest president to that point.

John Adams

AdamsJohnPresident John Adams
The first to do so, John Adams, held the distinction of being the longest-lived president for nearly two centuries, from 1803 until Ronald Reagan surpassed his lifespan in October 2001.
At 90, Adams became the longest-lived US president until Ronald Reagan surpassed him in 2001.

Bill Clinton

ClintonPresident ClintonPresident Bill Clinton
At age 46, he became the third-youngest president in history.

Herbert Hoover

HooverHerbert C. HooverPresident Hoover
(Four subsequent presidents have outlived them both: Jimmy Carter, Gerald Ford, Ronald Reagan and George H. W. Bush.) At the time of his death Hoover had been out of office for over 31 years (11553 days days altogether).

President of the United States

PresidentU.S. PresidentUnited States President
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.

United States presidential inauguration

inaugurationInauguration Daypresidential inauguration
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.

Median

averagesample medianmedian-unbiased estimator
The median age upon accession to the presidency is 55 years and 3 months.

Theodore Roosevelt

Teddy RooseveltPresident Theodore RooseveltRoosevelt
The youngest person to assume the office was Theodore Roosevelt, who became president at the age of 42 years, 332 days, following William McKinley's assassination; the oldest was Donald Trump, who was 70 years, 238 days old at his inauguration.

William McKinley

McKinleyPresident McKinleyPresident William McKinley
The youngest person to assume the office was Theodore Roosevelt, who became president at the age of 42 years, 332 days, following William McKinley's assassination; the oldest was Donald Trump, who was 70 years, 238 days old at his inauguration.

Assassination of William McKinley

assassinatedassassinationassassination of President William McKinley
The youngest person to assume the office was Theodore Roosevelt, who became president at the age of 42 years, 332 days, following William McKinley's assassination; the oldest was Donald Trump, who was 70 years, 238 days old at his inauguration.

Assassination of John F. Kennedy

assassinationJohn F. Kennedy assassinationassassinated
Assassinated three years into his term, John F. Kennedy was the youngest at the time of his departure from office (46 years, 188 days); the youngest president to leave office at the conclusion of a normal transition was Theodore Roosevelt (50 years, 140 days).

United States presidential transition

presidential transitionPresidential Transition Teamtransition team
Assassinated three years into his term, John F. Kennedy was the youngest at the time of his departure from office (46 years, 188 days); the youngest president to leave office at the conclusion of a normal transition was Theodore Roosevelt (50 years, 140 days).

Lyndon B. Johnson

Lyndon JohnsonJohnsonLyndon Baines Johnson
He was born after four of his successors: Lyndon Johnson (8 years, 9 months, 7 days); Ronald Reagan (6 years, 3 months, 24 days); Richard Nixon (4 years, 4 months, 17 days); and Gerald Ford (3 years, 10 months, 20 days). This is how old Lyndon B. Johnson was at the time of his inauguration.

Richard Nixon

Richard M. NixonNixonPresident Nixon
He was born after four of his successors: Lyndon Johnson (8 years, 9 months, 7 days); Ronald Reagan (6 years, 3 months, 24 days); Richard Nixon (4 years, 4 months, 17 days); and Gerald Ford (3 years, 10 months, 20 days).

Barack Obama

ObamaPresident ObamaPresident Barack Obama
The youngest living president is Barack Obama, born August 4, 1961 (age ).

Manner of death

natural causes#Unnatural Death
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, 238 days; only 103 days after leaving office.

James A. Garfield

James GarfieldGarfieldJames Abram Garfield
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, 238 days; only 103 days after leaving office.

Assassination

assassinassassinatedassassinate
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, 238 days; only 103 days after leaving office.