William Sloane may refer to:
William Douglas Sloane (1844–1915), American businessman, sportsman, philanthropist William Milligan Sloane (1850–1928), American educator and historian William A. Sloane (1854–1930), American judge William Sloane (author) (1906–1974), American writer
See also William Sloan (disambiguation) William Sloane Coffin (1924–2006), liberal Christian clergyman