William MacMillan or McMillan may refer to: William Duncan MacMillan (1871–1948), American mathematician and astronomer William Duncan MacMillan (businessman), American businessman William J. P. MacMillan (1881–1957), Canadian physician and Prince Edward Island politician William McMillan (congressman) (1764–1804), delegate to the United States Congress from the Territory Northwest of the River Ohio William McMillan (college president) (1777–1832), president of Jefferson College, 1817–1822 William McMillan (sculptor) (1887–1977), British sculptor and medal-designer William McMillan (Australian politician) (1850–1926), Irish-Australian politician, first Member for Wentworth William McMillan (sport shooter) (1929–2000), American sports shooter and Olympic Champion William Hector McMillan (1892–1974), Liberal party member of the Canadian House of Commons William McMillan (footballer, born 1872) (1872–1929), Scottish wing half who played for Southampton and Burnley in the late 1890s William McMillan (footballer, born 1876) (1876–1958), Scottish full back/centre half who played for Lincoln City in the 1890s/1900s William Macmillan (minister) (1927–2002), Moderator of the General Assembly of the Church of Scotland William Miller Macmillan (1885–1974), Scottish historian William L. McMillan (1936–1984), American physicist Will McMillan (1944–2015), American actor William Hutchison McMillan (1886–1947), Scottish mining engineer William Northrup McMillan (1872–1925), American-born Kenyan settler, adventurer, and philanthropist
See also Billy McMillan (disambiguation)