William Stein

William Stein may refer to:

• William A. Stein (born 1974), computer programmer and mathematician
• William Howard Stein (1911–1980), biochemist
• Willie Stein (died 2009), television producer and songwriter
• Bill Stein (born 1947), American baseball player
• Bill Stein (American football) (1899–1983), American football offensive lineman