2. William Henry Harrison
The US president who served shortest term in the office was William Henry Harrison.
More information:
William Henry Harrison was an American military officer and politician. He served as the 9th president of the United States. He was born on 9 February 1773 in Berkeley Plantation, Virginia, US.
He had the shortest presidency time in U.S. history. Henry Harrison died just 31 days after his inauguration on 4 April 1841. His presidential term was between 4 March 1841 to 4 April 1841.
He was from a political party called Whig Party.