The 9th President of the United States was William Henry Harrison President Harrison was in office from March 4, 1841 until April 4, 1841 when he died of pneumonia. He was in office for 32 days, the...
William Henry Harrison, the 9th U.S. President, died at the age of 68 from complications due to pneumonia, septicemia and jaundice on April 4, 1841. It was only his 32nd day in office.