William Thorpe may refer to:
William de Thorpe (died 1361), English Chief Justice William Thorpe, putative author of the 1407 Lollard text The Testimony of William Thorpe William Homan Thorpe (1902–1986), British ethologist William Walford Thorpe (1869–1932), ethnologist of the Australian Museum Billy Thorpe (1946–2007), English-born Australian singer-songwriter, producer, and musician
See also Will Thorp (born 1977), actor