Watkin is an English surname formed as a diminutive of the name Watt (also Wat), a popular Middle English given name itself derived as a pet form of the name Walter. First found in a small Welsh village in 1629.

Within the United Kingdom it is associated with being a Welsh surname.

It may refer to:

People Arthur Watkin, English footballer Billy Watkin, English footballer Cyril Watkin, English footballer Edward Watkin, Victorian railway chairman Edward Watkin (disambiguation) Evan Watkin, New Zealand cricket umpire Frank Watkin, English footballer George Watkin, English footballer Louise Watkin, British paralympic swimmer Pierre Watkin, an American actor Steve Watkin, English cricketer Steve Watkin (footballer), Welsh footballer Thomas Glyn Watkin, Welsh lawyer Watkin Tench, British marine officer in Australia's First Fleet Watkin Tudor Jones, also known as Ninja, South African rapper Sir Watkin Williams-Wynn, 6th Baronet, Welsh politician William Thompson Watkin (1836–1888), English archaeologist William Ward Watkin, American architect

See also Watkin Baronets Watkins (surname) Watcyn Atkin (disambiguation), Atkins (surname) Atkinson (surname)