William T. Stanley (c. 1957 – October 6, 2015) was an American mammalogist who was a manager of the collections at one of the world's largest natural history museums and a student of the mammals of eastern Africa. He was an evolutionary biologist and mammalogist, and at the time of his death was the director of the Field Museum of Natural History's Collections Center and the Collection Manager of the Field Museum's Collection of Mammals. Stanley studied the biogeography, ecology, evolution, and systematics of shrews, bats and rodents that live on mountains within Tanzania and surrounding countries.[1]