Will or William Blackwell may refer to:
Will Blackwell (born 1975), American football wide receiver William Blackwell (architect) (1850–1937), 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 (1882–1963), American fruit farmer and politician