William Dunlop
William Dunlop may refer to:
- William Dunlop (ecclesiastical historian), British professor of church history at the University of Edinburgh
- William Dunlop (motorcycle racer), British motorcycle racer
- William Dunlop (principal), Covenanter and principal of Glasgow University
- William [James Dunlop], Ontario MPP and cabinet minister
- William "Tiger" Dunlop, Member of Parliament for United Province of Canada and Warden of the Forests, Canada Company
- William Patterson Dunlop, Canadian actor
- William Vincent "Billy" Dunlop, convicted murderer who was the first person to be convicted under the new UK double jeopardy laws