John MacKay
John MacKay, Mackay, or McKay may refer to:
Arts and entertainment
- John Mackay (poet), Scottish Gaelic poet known as Am Pìobaire Dall
- John Henry Mackay, Scottish writer, anarchist, thinker and homosexual activist
- John Victor Mackay, American art director
- John D. Mackay, Orcadian schoolteacher
- John P. McKay, American historian and professor, author of A History of Western Society
- John McKay (pianist), Canadian-American pianist
- John McKay (guitarist), British guitarist and former member of Siouxsie & the Banshees
- John McKay (director), British film and television director
Business
- John Mackay (industrialist, born 1774), ship master and industrialist in Boston, Massachusetts
- John William Mackay, Irish-born American industrialist
- John Calder Mackay, American real estate developer
Military and public service
- John Frederick MacKay, Scottish recipient of the Victoria Cross
- Sir John McKay (police officer), British police officer
- John B. McKay, U.S. Navy officer and test pilot
- John McKay (attorney), United States Attorney for the Western District of the state of Washington
Politics
- John McKay (Ontario politician, born 1841), Ontario physician and political figure
- John McKay (English politician), British Labour Party MP for Wallsend, 1945–1964
- John Keiller MacKay, 19th Lieutenant Governor of Ontario, Canada, 1957–1963
- John George MacKay, farmer and political figure on Prince Edward Island
- William John MacKay, Ontario politician
- John P. MacKay, Ontario politician
- John MacKay, Baron MacKay of Ardbrecknish, Scottish Conservative Member of Parliament for Argyll, 1979–1987
- John McKay (Northern Ireland politician), member of the Northern Ireland Constitutional Convention
- John McKay (New Brunswick politician), former Speaker of the Legislative Assembly of New Brunswick and mayor of Miramichi, New Brunswick
- John McKay (Ontario politician, born 1948), member of the Canadian parliament
Science
- John Bain Mackay, nurseryman based in Clapton, London
- John Sturgeon Mackay, Scottish mathematician
- John Yule Mackay, Scottish anatomist and principal of University College, Dundee
- John Ross Mackay, Canadian geographer
- John McKay (mathematician), British-Canadian mathematician
Sports
- John Sutherland Mackay, Scottish medical doctor and president of Rio Tinto FC
- John McKay, co-founder of the Gaelic Athletic Association
- John McKay (footballer, born 1898), Scottish footballer
- John McKay (American football), American football coach
- John McKay (1950s footballer), Scottish footballer
- John Mackay (cricketer), Australian cricketer
- J. K. McKay, American football wide receiver
- John Mackay (rugby league), Australian rugby league player
Others
- John Mackay, 11th of Strathnaver, Scottish chief of Clan Mackay
- John Mackay (Australian pioneer), founder of the city of Mackay, Australia
- John A. Mackay, Scottish missionary and founder of the Anglo-Peruvian School in Lima, Peru
- John Calvin MacKay, Free Church of Scotland minister
- John MacKay (journalist), Scottish television journalist and newscaster