Gareth Williams may refer to:
Arts and entertainment Gareth Williams (British musician) (1953–2001), member of English group This Heat Gareth F. Williams (1955–2016), Welsh novelist and television writer Gareth Williams (composer) (born 1977), Irish composer Gareth Williams (New Zealand actor) (born 1987), New Zealand television, film and theater actor Gareth Williams (American actor) (born 1965), American actor
Sports Association football (soccer) Gareth Williams (footballer, born 1941) (1941–2018), English-born Welsh footballer Gareth Williams (footballer, born 1967), English footballer Gareth Williams (footballer, born 1981), Scottish footballer Gareth Williams (footballer, born 1982), South African-born Welsh footballer
Rugby Gareth Williams (rugby union, born 1954) (1954–2018), Wales and British Lions international rugby union player Gareth Williams (rugby union, born 1978), Wales international rugby union hooker Gareth Williams (rugby union, born 1981), Welsh rugby union flanker Gareth Williams (rugby union, born 1988), Welsh rugby union scrum-half
Other sports Gareth Williams (cricketer) (born 1973), English cricketer Gareth Williams (tennis), South African tennis player
Others Gareth Williams, Baron Williams of Mostyn (1941–2003), Welsh barrister and Labour politician Gareth V. Williams (born 1965), English-American astronomer at the Minor Planet Center Gareth Wyn Williams (1978–2010), Welsh mathematician, employee of Britain's GCHQ signals intelligence agency, found dead in 2010 Gareth Williams (Latin Americanist) (fl. 1990s), Latin Americanist, member of Latin American subaltern studies group
See also Garth Williams (1912–1996), American children’s illustrator Gary Williams (disambiguation)