William McKay (disambiguation)

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 player) (1921–1997), Irish rugby union player
 * Billy Mckay, Northern Irish footballer
 * William Cameron McKay (1824–1893), U.S. Army officer, scout, physician and surgeon