Gareth Griffiths

• Gareth Griffiths (rugby union), Welsh rugby union player
• Gareth Griffiths (academic), Australian professor
• Gareth Griffiths (academic), Australian professor
• Gareth Griffiths (footballer), English former footballer
• Gareth Griffiths (field hockey), Welsh field hockey player
• Gareth Griffiths, a character in ''Fireman Sam''