William Griffiths
William, Will, Bill or Billy Griffiths may refer to:
Sports
- William Griffiths (boxer), Australian Olympic boxer
- William Griffiths (field hockey), British Olympic hockey player
- Will Griffiths (rugby union), Welsh rugby union player
- Bill Griffiths (footballer, born 1879), Australian rules footballer
- Bill Griffiths (footballer, born 1896), Australian rules footballer
- Billy Griffiths (footballer, born 1876),, English footballer
Others
- William Griffiths (VC), Irish recipient of the Victoria Cross
- William Griffiths (politician), British politician
- Hugh Griffiths, Baron Griffiths, British soldier, cricketer, judge and life peer
- William Garonwy Griffiths, American author
- Bill Griffiths (poet), British poet and scholar
- Billy Griffiths (writer), Australian historian and writer