William McKay (1772–1832) was a Canadian soldier and administrator.
William or Bill McKay may also refer to:
William McKay (footballer), Scottish footballer William McKay (parliamentary official) (born 1939), British government administrator, Clerk of the House of Commons William McKay (politician) (1847–1915), Canadian Senator representing Nova Scotia Bill McKay (footballer, born 1906) (1906–1977), Scottish association footballer Bill McKay (Australian footballer) (1879–1950), Australian rules footballer Bill McKay (rugby union) (1921–1997), Irish rugby union player Billy Mckay, Northern Irish footballer William Cameron McKay (1824–1893), U.S. Army officer, scout, physician and surgeon Bill McKay, fictional politician played by Robert Redford in The Candidate (1972 film)
See also William Mackay (disambiguation) William McKee (disambiguation) William McKie (disambiguation)