William Hanna (1910–2001) was an American animator, director, producer and cartoon artist.
William or Bill Hanna may also refer to: William B. Hanna (1866–1930), American sportswriter William S. Hanna (1923–1994), Howard County Maryland politician William T. Hanna (1920–1942), U.S. Marine William Hanna (minister) (1808–1882), Scottish theological writer and biographer William Hanna (railroad president) (born 1827), namesake of Hanna City, Illinois, U.S. William Fahmy Hanna (born 1928), Egyptian Olympic athlete William John Hanna (1862–1919), lawyer and political figure in Ontario, Canada William Selim Hanna (1896–1980), Egyptian Minister of Housing
See also William Hannah (1867–1942), cricket umpire Willie Hannah (1921–1978), Scottish footballer William W. Hannan (1854–1917), Detroit real estate developer