William Greenleaf may refer to:
William Greenleaf (American scientist) (born 1979), professor of genetics at the Stanford University School of Medicine and co-inventor of ATAC-seq William Greenleaf (American novelist) (born 1948), author of 1980 sci-fi novel Time Jumper W. H. Greenleaf (19272008), British political scientist and author of The British Political Tradition William Greenleaf Eliot (18111887), American civic leader and founder of Washington University in St. Louis