Derek Williams may refer to:
Sports Association football Derek Williams (footballer, born 1922) (1922–2019), English footballer for Chester City Derek Williams (footballer, born 1934) (1934–2014), Welsh footballer Derek Williams (footballer, born 1937) (1937–2015), English footballer for Grimsby Town
Other sports Derek Williams (boxer) (born 1965), English heavyweight boxer of the 1980s and 1990s Derek Williams (sportsman) (1924–2014), former Welsh international rugby union player and first-class cricketer
The arts Derek Williams (musician) (1952–), British composer, conductor, orchestrator Derek Williams (filmmaker) (1929–2021), British documentary film director and writer Derek Williams (art collector) (1929–1984), Welsh collector of modern art
See also Derrick Williams (disambiguation)