William Griffin
William, Willie, Will, Billy or Bill Griffin may refer to:
Arts and entertainment
- William Griffin (painter), New Zealand painter
- Billy Griffin, American singer-songwriter
- Rakim, American rapper
- Bill Griffin (musician), American mandolinist and luthier
Religion
- William Richard Griffin, American Roman Catholic bishop
- William A. Griffin (Roman Catholic bishop), American Roman Catholic Bishop of Trenton
- William A. Griffin (Christian churches and churches of Christ), Christian preacher and President of Mid-Atlantic Christian University
Sports
- Willie Griffin, Irish hurler
- Billy Griffin (footballer), English footballer, see List of [Sheffield Wednesday F.C. players]
- William Griffin (rugby), Welsh rugby union and rugby league footballer
Others
- William [Henry Griffin], Canadian civil servant
- William D. Griffin, American historian, author, and educator
- William Griffin (geologist), recipient of the Clarke Medal for 2013 in the field of geology