Gareth Griffiths may refer to:
Gareth Griffiths (rugby union) (1931–2016), Welsh rugby union player Gareth Griffiths (academic) (born 1943), Australian professor Gareth Griffiths (academic) (born 1943), Australian professor Gareth Griffiths (footballer) (born 1970), English former footballer Gareth Griffiths (field hockey) (born 1999), Welsh field hockey player Gareth Griffiths, a character in Fireman Sam
See also Gareth Griffith, a Welsh artist