William Stanley
William Stanley is the name of the following people:
- William Stanley (knight) (around 1435–1495), English knight and general
- William Stanley, 3rd Baron Monteagle (around 1528–1581), English nobleman
- William Stanley, 6th Earl of Derby (1561–1642), English nobleman
- William Stanley (inventor) (1858–1916), American inventor
- William E. Stanley (1844-1910), American politician (Kansas)
- William T. Stanley (around 1957-2015), American zoologist
