List of presidents of the United States by time in office - wikipedia List of presidents of the United States by time in office Franklin Delano Roosevelt Longest presidency 4,422 days 1933 -- 1945 William Henry Harrison Shortest presidency 31 days 1841 This is a list of Presidents of the United States by time in office. The basis of the list is the difference between dates ; if counted by number of calendar days all the figures would be one greater, with the exception of Grover Cleveland, who would receive two days. Since 1789, there have been 44 people sworn into office as President of the United States, and 45 presidencies, as Grover Cleveland served two non-consecutive terms and is counted chronologically as both the 22nd and 24th president. Of the individuals elected president, four ( William Henry Harrison, Zachary Taylor, Warren G. Harding, and Franklin D. Roosevelt ) died of natural causes while in office, four ( Abraham Lincoln, James A. Garfield, William McKinley, and John F. Kennedy ) were assassinated, and one ( Richard Nixon ) resigned. William Henry Harrison spent the shortest time in office, and Franklin D. Roosevelt spent the longest. He is the only president to have served more than two terms. Following ratification of the 22nd Amendment in 1951, presidents -- beginning with Dwight D. Eisenhower -- have been ineligible for election to a third term or for election to a second full term after serving more than two years of a term to which some other person was elected president. The amendment contained a grandfather clause that explicitly exempted the incumbent president -- then Harry S. Truman -- from the new term limitations. Contents 1 Presidents by time in office 1.1 Notes 2 References 3 External links Presidents by time in office Rank President Length in days Order of presidency Number of terms Franklin D. Roosevelt 7003442200000000000 ♠ 4,422 32 ! 32nd March 4, 1933 -- April 12, 1945 Three full terms ; died 2 months and 23 days into fourth term tie Thomas Jefferson 7003292200000000000 ♠ 2,922 03 ! 3rd March 4, 1801 -- March 4, 1809 Two full terms James Madison 7003292200000000000 ♠ 2,922 04 ! 4th March 4, 1809 -- March 4, 1817 Two full terms James Monroe 7003292200000000000 ♠ 2,922 05 ! 5th March 4, 1817 -- March 4, 1825 Two full terms Andrew Jackson 7003292200000000000 ♠ 2,922 07 ! 7th March 4, 1829 -- March 4, 1837 Two full terms Ulysses S. Grant 7003292200000000000 ♠ 2,922 18 ! 18th March 4, 1869 -- March 4, 1877 Two full terms Grover Cleveland 2,922 22 ! 22nd March 4, 1885 -- March 4, 1889 Two full terms ( non-consecutive ) 24 ! 24th March 4, 1893 -- March 4, 1897 Woodrow Wilson 7003292200000000000 ♠ 2,922 28 ! 28th March 4, 1913 -- March 4, 1921 Two full terms Dwight D. Eisenhower 7003292200000000000 ♠ 2,922 34 ! 34th January 20, 1953 -- January 20, 1961 Two full terms Ronald Reagan 7003292200000000000 ♠ 2,922 40 ! 40th January 20, 1981 -- January 20, 1989 Two full terms Bill Clinton 7003292200000000000 ♠ 2,922 42 ! 42nd January 20, 1993 -- January 20, 2001 Two full terms George W. Bush 7003292200000000000 ♠ 2,922 43 ! 43rd January 20, 2001 -- January 20, 2009 Two full terms Barack Obama 7003292200000000000 ♠ 2,922 44 ! 44th January 20, 2009 -- January 20, 2017 Two full terms 14 George Washington 7003286500000000000 ♠ 2,865 01 ! 1st April 30, 1789 -- March 4, 1797 Two full terms 15 Harry S. Truman 7003284000000000000 ♠ 2,840 33 ! 33rd April 12, 1945 -- January 20, 1953 One partial term ( 3 years, 9 months, and 8 days ), followed by one full term 16 Theodore Roosevelt 7003272800000000000 ♠ 2,728 26 ! 26th September 14, 1901 -- March 4, 1909 One partial term ( 3 years, 5 months, and 18 days ), followed by one full term 17 Calvin Coolidge 7003204100000000000 ♠ 2,041 30 ! 30th August 2, 1923 -- March 4, 1929 One partial term ( 1 year, 7 months, and 2 days ), followed by one full term 18 Richard Nixon 7003202700000000000 ♠ 2,027 37 ! 37th January 20, 1969 -- August 9, 1974 One full term ; resigned 1 year, 6 months, and 20 days into second term 19 Lyndon B. Johnson 7003188600000000000 ♠ 1,886 36 ! 36th November 22, 1963 -- January 20, 1969 One partial term ( 1 year, 1 month, and 29 days ), followed by one full term 20 William McKinley 7003165400000000000 ♠ 1,654 25 ! 25th March 4, 1897 -- September 14, 1901 One full term ; assassinated 6 months and 2 days into second term, dying 8 days later, 6 months and 10 days into that term 21 Abraham Lincoln 7003150300000000000 ♠ 1,503 16 ! 16th March 4, 1861 -- April 15, 1865 One full term ; assassinated 1 month and 10 days into second term, dying 1 day later, 1 month and 11 days into that term 22 tie John Quincy Adams 7003146100000000000 ♠ 1,461 06 ! 6th March 4, 1825 -- March 4, 1829 One full term Martin Van Buren 7003146100000000000 ♠ 1,461 08 ! 8th March 4, 1837 -- March 4, 1841 One full term James K. Polk 7003146100000000000 ♠ 1,461 11 ! 11th March 4, 1845 -- March 4, 1849 One full term Franklin Pierce 7003146100000000000 ♠ 1,461 14 ! 14th March 4, 1853 -- March 4, 1857 One full term James Buchanan 7003146100000000000 ♠ 1,461 15 ! 15th March 4, 1857 -- March 4, 1861 One full term Rutherford B. Hayes 7003146100000000000 ♠ 1,461 19 ! 19th March 4, 1877 -- March 4, 1881 One full term Benjamin Harrison 7003146100000000000 ♠ 1,461 23 ! 23rd March 4, 1889 -- March 4, 1893 One full term William Howard Taft 7003146100000000000 ♠ 1,461 27 ! 27th March 4, 1909 -- March 4, 1913 One full term Herbert Hoover 7003146100000000000 ♠ 1,461 31 ! 31st March 4, 1929 -- March 4, 1933 One full term Jimmy Carter 7003146100000000000 ♠ 1,461 39 ! 39th January 20, 1977 -- January 20, 1981 One full term George H.W. Bush 7003146100000000000 ♠ 1,461 41 ! 41st January 20, 1989 -- January 20, 1993 One full term 33 John Adams 7003146000000000000 ♠ 1,460 02 ! 2nd March 4, 1797 -- March 4, 1801 One full term 34 John Tyler 7003143000000000000 ♠ 1,430 10 ! 10th April 4, 1841 -- March 4, 1845 One partial term ( 3 years and 11 months ) 35 Andrew Johnson 7003141900000000000 ♠ 1,419 17 ! 17th April 15, 1865 -- March 4, 1869 One partial term ( 3 years, 10 months, and 17 days ) 36 Chester A. Arthur 7003126200000000000 ♠ 1,262 21 ! 21st September 19, 1881 -- March 4, 1885 One partial term ( 3 years, 5 months, and 13 days ) 37 John F. Kennedy 7003103600000000000 ♠ 1,036 35 ! 35th January 20, 1961 -- November 22, 1963 Assassinated 2 years, 10 months, and 2 days into term 38 Millard Fillmore 7002969000000000000 ♠ 969 13 ! 13th July 9, 1850 -- March 4, 1853 One partial term ( 2 years, 7 months, and 23 days ) 39 Gerald Ford 7002895000000000000 ♠ 895 38 ! 38th August 9, 1974 -- January 20, 1977 One partial term ( 2 years, 5 months, and 11 days ) 40 Warren G. Harding 7002881000000000000 ♠ 881 29 ! 29th March 4, 1921 -- August 2, 1923 Died 2 years, 4 months, and 29 days into term 41 Zachary Taylor 7002492000000000000 ♠ 492 12 ! 12th March 4, 1849 -- July 9, 1850 Died 1 year, 4 months, and 5 days into term 42 Donald Trump 7002431000000000000 ♠ 431 45 ! 45th January 20, 2017 -- Incumbent Serving first term 43 James A. Garfield 7002199000000000000 ♠ 199 20 ! 20th March 4, 1881 -- September 19, 1881 Assassinated 3 months and 28 days into term, dying 79 days later, 6 months and 15 days into term 44 William Henry Harrison 7001310000000000000 ♠ 31 09 ! 9th March 4, 1841 -- April 4, 1841 Died 31 days into term Notes Jump up ^ The 20th Amendment ( ratified in 1933 ) moved Inauguration Day from March 4 to January 20. The 1937 presidential inauguration was the first to take place on the new date. As a result, Franklin D. Roosevelt 's first term in office ( 1933 -- 1937 ) was only 7003141800000000000 ♠ 1,418 days long, 1 month and 12 days shorter than a normal term. ^ Jump up to : Died in office Jump up ^ Did not seek re-election in 1876. He sought a non-consecutive third term in 1880, but was defeated for renomination at the Republican National Convention. Jump up ^ Each of Grover Cleveland 's two non-consecutive terms in office was 1,461 days long. ^ Jump up to : Incumbent president who sought a second term but was defeated in a quadrennial presidential election. ^ Jump up to : Of years evenly divisible by 100, only those evenly divisible by 400 are leap years. The years 1800 and 1900 are divisible by 100, but not by 400. Thus, John Adams 's term and McKinley 's first term did not include a 366 - day leap year, so those terms were one day shorter than a normal full term. The year 2000 is divisible by 400 and so did include one, thus Clinton 's second term was not shorter than his first. Jump up ^ Due to logistical delays, Washington 's first inauguration was held 1 month and 26 days after the scheduled start of operations of the new government under the Constitution. As a result, his first term was only 7003140400000000000 ♠ 1,404 days long, and was the shortest term for a U.S. president who neither died in office nor resigned. ^ Jump up to : Succeeded to presidency. Jump up ^ Did not seek re-election in 1908. In 1912, he ran for a non-consecutive second full term, this time on the Progressive Party ticket, but was defeated. Jump up ^ Resigned from office Jump up ^ Subsequently sought a non-consecutive second term, first in 1844, but was defeated for renomination at the Democratic National Convention, and then again in 1848 ( this time on the Free Soil Party ticket ), but was defeated. Jump up ^ The only incumbent president who had never been elected to national office, he sought election to a full term in 1976, but was defeated. Jump up ^ As of March 27, 2018. References Jump up ^ Cleaves, Freeman ( 1939 ). Old Tippecanoe : William Henry Harrison and His Time. C. Scribner 's Sons. p. 152. Jump up ^ Ingersoll, Jared. `` Death of the President ''. University of Virginia 's Miller Center of Public Affairs. Archived from the original on October 8, 2010. Retrieved November 2, 2010. Jump up ^ Russell, Francis ( 1962 ). The Shadow of Blooming Grove -- Warren G. Harding in His Times. Easton Press. p. 591. ISBN 0070543380. ^ Jump up to : Martin, Paul `` Lincoln 's Missing Bodyguard '', Smithsonian Magazine, April 8, 2010, Retrieved November 15, 2010 Jump up ^ Donald ( 1996 ), p. 597. Jump up ^ `` Big Ben Parker and President McKinley 's Assassination ''. Math.buffalo.edu. Retrieved August 8, 2011. Jump up ^ `` Nixon Resigns ''. The Washington Post. Retrieved December 31, 2008. External links Wikimedia Commons has media related to President of the United States. 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Question: who served the least amount of time as president
Answer: William Henry Harrison