John Watt may refer to:
John Watt (politician) (1826–1897), Australian politician, member of the New South Wales Legislative Council John Watt (physicist) (born 1932), Australian physicist John Watt (cricketer) (1858–1914), Australian cricketer John Alexander Watt (1868–1958), Australian geologist and mineralogist John Charles Watt (1884–1961), Australian cricketer and son of the above cricketer John Watt (broadcaster) (1901–1960), British broadcaster and producer John Millar Watt (1895–1975), British painter, illustrator and comics artist John Mitchell Watt (1892-1980) South African pharmacologist and author
See also John Watts (disambiguation) Jack Watt (disambiguation)