William Cannon (1809–1865), was an American politician.
William Cannon (or variants) may also refer to:
Sports Bill Cannon (footballer) (born 1956), Australian rules footballer for St Kilda Billy Cannon (1937–2018), American football player Billy Cannon Jr. (born 1961), his son, American football player William Cannon (cricketer) (1871–1933), Australian cricketer Willie Cannon (American football), American arena football player (see: Denver Dynamite (arena football)) William Cannon (dancer) from Dance Magazine's "25 to Watch"
TV and film William Cannon (director) (1907–1990), American director William Cannon (actor), American actor in Days of Darkness (2007 American film) William Cannon (writer), TV show writer (Going Bananas)
Others William Cannon (pioneer) (1755–1854), Oregon Country pioneer William Ragsdale Cannon (1916–1997), American bishop Will Cannon, Sr. and Will Cannon, Jr., architects, founders of CannonDesign
See also Doran William Cannon (1937–2005), American screenwriter James William Cannon (1852–1921), American industrialist, founded the Cannon Mills Corporation