James Watt (1736–1819) was a Scottish engineer and inventor of a revolutionary new steam engine.
James or Jim Watt may also refer to:
Business and industry James Watt, Jr (1769–1848), Scottish engineer, businessman and activist Angus Watt (financial advisor) (James Angus Reid Watt, born 1952), Canadian financial advisor James Watt (entrepreneur) (born 1982), founder of BrewDog
Law and politics James G. Watt (1938–2023), U.S. Secretary of the Interior James Watt (Florida politician) (1944–2025), American politician from Florida James Watt (diplomat) (born 1951), British ambassador
Sports Jim Watt (rugby union) (1914–1988), New Zealand rugby union player Russell Watt (James Russell Watt, 1935–2022), New Zealand rugby union player Jim Watt (boxer) (born 1948), Scottish boxer Jim Watt (ice hockey) (born 1950), American ice hockey player James Watt (tennis) (born 2000), New Zealand tennis player
Others James Cromar Watt (1862–1940), Scottish artist, architect and jeweler James Watt (actuary) (1863–1945), Scottish actuary and geographer Sir James Watt (Royal Navy officer) (1914–2009), British surgeon James C. Y. Watt (born 1936), art historian James Watt (loyalist) (born 1952), Northern Irish loyalist paramilitary
Other uses James Watt College (founded 1908), Greenock, Scotland HMS James Watt (launched 1853), steam- and sail-powered Royal Navy ship
See also James Watts (disambiguation)