William Thornton (disambiguation)
William Thornton was an American physician, inventor, painter and architect.
William Thornton or Bill Thornton may also refer to:
- Sydney Jim, alias of English-born convict and bushranger in Australia
- William Thornton (academic), principal of Hart Hall, later Hertford College, Oxford, 1688–1707
- William Thornton (died 1769), English militia officer and politician
- William Thornton (Virginia burgess), Colonial Virginia planter and politician
- William Thornton (British Army officer), British general
- William Thornton (Kansas politician), Kansas politician
- William E. Thornton, American astronaut
- William J. Thornton, American businessman and politician
- William L. Thornton, New York politician and judge
- William Neville John Thornton, Northern Irish politician
- William Patton Thornton, American physician
- William Taylor Thornton, governor of New Mexico Territory, 1893–1897
- William Wheeler Thornton, American jurist and author from Indiana
- Willie Thornton, Scottish footballer
- William Thornton (firefighter), first firefighter to die on the job in Ontario
- *William Thornton (fireboat), see fireboats of Toronto
- Willie Thornton (Canadian football), Canadian football wide receiver
- Bill Thornton, mayor of San Antonio, Texas, 1995–1997
- Bill Thornton (American football), American football fullback
- Billy Bob Thornton, American actor
- Billy Thornton (rugby league), rugby league footballer of the 1940s for England, and Hunslet
- William Thornton (Queensland politician), member of the Queensland Legislative Council
- William Thomas Thornton, English economist, civil servant, and author