William Watt
William Watt may refer to:
- William Watt , Irish Olympic athlete
- William Watt , Premier of Victoria and Speaker of the House of Representatives
- William Watt, journalist working for the Blackpool Gazette
- William Watt , California Gold Rush mining executive and California politician
- William Watt , Scottish missionary to the New Hebrides
- William Watt, Welsh international rugby union player
- William Hogg Watt, member of parliament in the Manawatu region of New Zealand
- W. Montgomery Watt, Scottish historian and professor of Arabic and Islamic Studies
- William Redfern Watt, New South Wales politician
- Willie Watt, Scottish footballer
- Willie Watt, Scottish footballer
- Willie Watt , Scottish golfer
- Willie Watt, a character from the animated series Batman Beyond
- Blackie Watt, American racing driver