William Stern may refer to: William Stern (businessman) (1935–2020), owner of the British Stern Group of companies William Stern (psychologist) (1871–1938), German psychologist and philosopher William Stern, father of American surrogate child Baby M William Joseph Stern (1891–1965), physicist and jet engine developer William M. Stern, rabbi at Temple Sinai in Oakland, California Bill Stern (1907–1971), American actor and sportscaster
See also William T. Stearn (1911–2001), British botanist Bill Stearns (1853–1898), American baseball player