William, Willie, or Bill Nixon may refer to:
William Charles Wallace Nixon (1903 - 1966), professor of obstetrics and gynaecology, london William Nixon (minister) (1803-1900), Moderator of the General Assembly of the Free Church of Scotland William M. Nixon (1814–1893), English Australian gunmaker William Penn Nixon (1832–1912), American publisher William Nixon (architect) (1859-1931), Australian architect in New South Wales William Glennie Nixon (1881–?), Canadian farmer Bill Nixon (William John Nixon, 1886–1916), English footballer Willie Nixon (1916–?), American baseball player