John Watt
John Watt may refer to:
- John Watt (politician), Australian politician, member of the New South Wales Legislative Council
- John Watt (physicist), Australian physicist
- John Watt (cricketer), Australian cricketer
- John Alexander Watt, Australian geologist and mineralogist
- John Charles Watt, Australian cricketer and son of the above cricketer
- John Watt (broadcaster), British broadcaster and producer
- John Millar Watt, British painter, illustrator and comics artist
- John Mitchell Watt South African pharmacologist and author