There are 8 United States presidents who have died while in office, 4 were assassinated, while 4 others died of natural causes. They are: William Henry Harrison (Natural Causes), Zachary Taylor, (Natural Causes), Abraham Lincoln (assassinated), James Garfield (assassinated), William McKinley (assassinated), Warren G. Harding (natural causes), Franklin D. Roosevelt (April 12, 1945), and John F. Kennedy (assassinated).
There were approximately 8 presidents that died while in office. The ones that died in office are John F. Kennedy, Franklin Delano Roosevelt, Warren G. Harding, William McKinley, James Garfield, Abraham Lincoln, Zachary Taylor and William Henry Harrison.
There have been 8 presidents who died while in office of either natural causes or due to assassinations. These included, William Harrison, Zachary Taylor, Abe Lincoln, James Garfield, William McKinley, Franklin Roosevelt and John F Kennedy.