William Blackwell
Will or William Blackwell may refer to:
- Will Blackwell, American football wide receiver
- William Blackwell (architect), Canadian architect who worked in Peterborough, Ontario
- William Blackwell (captain), founder of Mortlake, Connecticut
- William Blackwell (pole vaulter), co-winner of the 1944 NCAA DI outdoor pole vault championship
- William H. Blackwell, American fruit farmer and politician