William Ireland may refer to:
William Ireland (Jesuit) (1636–1679), English Jesuit executed during the reign of King Charles II William Henry Ireland (1775–1835), forger of would-be Shakespearean documents and plays William Wotherspoon Ireland (1832–1909), Scottish physician and author William M. Ireland (died 1891), co-founder of the National Grange of the Order of Patrons of Husbandry William Henry Ireland (politician) (1884–?), Ontario merchant and political figure William Ireland (tennis), Irish tennis player Bill Ireland, founder of the UNLV football program and later athletic director of UNLV