The surname Watt may refer to:
Watt of Sussex, Anglo-Saxon king
Adam Watt, Australian boxer
Alexander Watt, British plant ecologist
Alan Watt, Australian diplomat
Allan Watt, Scottish sprinter
Ben Watt, British musician and music producer
Davey Watt, Australian speedway rider
David Watt (computer scientist), British computer scientist
David Gibson-Watt, British politician
Douglas Watt (politician), Canadian politician
Eddie Watt, Major League Baseball pitcher
Erin Watt, pseudonym of a US bestseller author duo
Francis Watt (disambiguation), various people
Geoff Watt, Australian runner
George Watt (disambiguation), multiple people
Hamish Watt, Scottish politician
Ian Watt, literary historian
James Watt, Scottish engineer, for whom is named the watt, the SI-derived unit of power
James Watt Jr., English manufacturer, the son of James Watt the engineer
James G. Watt, US Secretary of the Interior
Jim Watt (boxer), Scottish boxer
Joachim von Watt, the birth name of Swiss scholar Joachim Vadian
Joseph Watt, Scottish VC recipient
Joseph M. Watt, American judge
J. J. Watt, American football defensive end for the Houston Texans
Kathy Watt, Australian cyclist
Lawrence Watt-Evans, American fantasy writer
Leslie Watt, New Zealand cricketer
Mel Watt, American politician
Michael Watt (disambiguation), multiple people
Mike Watt, American musician
Mike Watt (disambiguation), multiple people
Mitchell Watt, Australian track and field athlete
Mitchell Watt (basketball), American basketball player
Nicole Watt, Canadian skater
Norman Watt-Roy, bassist of Ian Dury and The Blockheads
Phil Watt, English footballer
Richard Harding Watt, designer of buildings in Knutsford, Cheshire
Robert Watt, Canadian herald
Robert Watson-Watt, British developer of radar
Sanchez Watt, English footballer
Sarah Watt (1958–2011), Australian film director
Sheila Watt-Cloutier, Canadian activist
Steven Watt (footballer), a professional soccer player, formerly of Chelsea F.C.
T. J. Watt, American football pllayer
Tom Watt, Canadian hockey coach
Tom Watt (actor), British actor, journalist and radio DJ
Tony Watt, Scottish footballer
William Watt (disambiguation), multiple people
