William McGill is the name of:
William McGill (politician) (1814–1883), Scottish member of the Ontario Provincial Parliament William J. McGill (1922–1997), American psychologist and university administrator Willie McGill (1873–1944), American major league baseball pitcher Bill McGill (1939–2014), basketball player Bill McGill (baseball) (1880–1959), American baseball pitcher in Major League Baseball
See also William Gill (disambiguation) McGill (surname)