William Henry
Willie, Billy, Bill, Will or William Henry may refer to:
Politicians
- William Henry (gunsmith), American gunsmith and Pennsylvania delegate to Continental Congress
- William Henry (brother of Patrick Henry), American member of Colonial Virginia House of Burgesses
- William Henry (congressman), American legislator from Vermont
- William Alexander Henry, Canadian Supreme Court justice
- William Wirt Henry, American lawyer, politician and historian in Virginia
- William H. Henry, Socialist Party of America Executive Secretary during late 1920s
- William Thomas Henry, Canadian politician; Legislative Assembly of Alberta member
- William Henry, Libertarian nominee for Lieutenant Governor of Indiana in the 2020 Indiana gubernatorial election
Royalty
- William Henry, Prince of Orange, future King William III of England
- William Henry, Prince of Nassau-Usingen, member of German royalty
- William Henry, Prince of Nassau-Saarbrücken, member of German royalty
- Prince [William Henry, Duke of Gloucester and Edinburgh], younger brother of King George III of the United Kingdom
- William Henry, Duke of Clarence, future King William IV of the United Kingdom
Sportspeople
- William Henry (swimmer), English Olympic competitor
- Billy Henry, Scottish footballer
- Bill Henry (footballer), Australian rules forward
- Bill Henry (basketball), American center
- Bill Henry (baseball, born 1927), American pitcher for six MLB teams
- Bill Henry (baseball, born 1942), American pitcher for New York Yankees
- Will Henry (footballer), English goalkeeper
Writers
- William Henry (priest), Anglo-Irish Dean of Killaloe
- William Arnon Henry, American academic and agriculturist from Ohio
- William J. Henry, American hymn writer
- Bill Henry (journalist), American newspaper reporter
- Bill Fitz Henry, Australian journalist with The Bulletin
- William E. Henry, American psychologist
- William A. Henry III, American author and cultural critic
- Will Henry, pen name of American screenwriter Henry Wilson Allen
- Will Henry, pen name of William Henry Wilson, cartoonist and writer of ''Wallace the Brave''
Others
- William Henry (missionary), Irish missionary, active in Tahiti and New South Wales, Australia
- William Henry (chemist), English chemist who formulated Henry's law
- William Henry (pastor), Scottish Congregationalist pastor
- William "Jerry" Henry, American fugitive slave who was freed in New York event known as Jerry Rescue
- William W. Henry, American Civil War Medal of Honor recipient
- William Henry (actor), American performer; also billed as Bill Henry
- E. William Henry, American public official; chairman of FCC
- William Henry Fraser, Canadian politician