James Watt (disambiguation)
James Watt was a Scottish engineer and inventor of a revolutionary new steam engine.
James or Jim Watt may also refer to:
- James Watt, Jr, Scottish engineer, businessman and activist
- HMS James Watt, steam- and sail-powered Royal Navy ship named after the inventor
- James Cromar Watt, Scottish artist, architect and jeweller
- James Watt (actuary), Scottish actuary and geographer
- James Watt College, Greenock, Scotland
- Jim Watt (rugby union), New Zealand rugby union player and paediatrician
- James Russell Watt, New Zealand rugby union player
- Sir James Watt (Royal Navy officer), British surgeon, Medical Director-General of the Royal Navy
- James G. Watt, US Secretary of the Interior
- Jim Watt (boxer), Scottish boxer
- Jim Watt (ice hockey), American ice hockey player
- James Watt (diplomat), British ambassador
- James Angus Watt (financial advisor), Canadian financial advisor
- James Watt (loyalist), former Northern Irish loyalist paramilitary
- James Watt (entrepreneur), founder of BrewDog
- James Watt (tennis), New Zealand tennis player