William Hart
William Hart, also Will, Willy, Bill, or Billy Hart may refer to:
Arts and entertainment
- William Hart , English Caroline actor
- William Hart , Scottish-American painter
- William Hart , American soul singer, member of The Delfonics
- William Matthew Hart, British lithographer and bird artist
- William S. Hart, American silent film actor, screenwriter, director, and producer
- William Sterling Hart, American actor, better known as Robert Sterling
- Will Cullen Hart, American musician and artist
- Billy Hart, American jazz drummer
Judiciary
- William Hart of Livelands, Scottist jurist and 16th century Lord Advocate
- William H. H. Hart, American California attorney general
- William L. Hart, American justice of the Supreme Court of Ohio
- William Thomas Hart, United States federal judge
Sports
- Bill Hart , English professional footballer
- Bill Hart , American professional baseball third-baseman with the Brooklyn Dodgers
- Bill Hart , American professional baseball pitcher
- Billy Hart , American professional baseball player
Other fields
- William Hart , Bishop of Dunkeld
- William Hart , American sailor
- William Hart, MP for Bletchingley
- William Hart , Detroit Police Chief
- William Hart , Tasmanian businessman
- William Hart , Catholic martyr
- William Hart, drilled the first natural gas well in the US, leading to the Fredonia Gas Light Company's formation
- William C. Hart, United States Coast Guard member awarded the Gold Lifesaving Medal
- William E. Hart, Union Army soldier during the American Civil War
- William Ewart Hart, Australian aviator and dentist
- William Neville Hart, British banker, politician and diplomat
- William Stanford Hart Sr., mayor of East Orange, New Jersey
Fictional characters
- Bill Hart, the civilian identity of the Lev Gleason Publications and Image Comics superhero Daredevil