William Gillespie
William or Bill Gillespie may refer to:
- William Gillespie (actor), Scottish actor
- William Gillespie (New Zealand politician), New Zealand politician of the National Party
- William Ernest Gillespie, American educator
- William John Gillespie, Canadian World War I flying ace
- Willie Earl Gillespie, American football wide receiver
- Bill Gillespie (journalist), Canadian journalist and author
- Bill Gillespie (politician), American politician
- Bill Gillespie (footballer), Australian rules footballer
- Bill Gillespie (rugby league), Australian rugby league player
- Billie Gillespie, English footballer
- Billy Gillespie, Irish footballer
- William David Gillespie, New Zealand rugby union player