John Macdonald or MacDonald may refer to:

Government

Literature

• John D. MacDonald (1916–1986), American mystery author
• John McDonald, pseudonym of Kenneth Miller (1915–1983), Canadian-American mystery author, better known as Ross Macdonald

Military

• John MacDonald of Garth (1771–1866), Scottish-Canadian participant in the Pemmican war
• John Macdonald (British Army officer, died 1850) (bef. 1795–1850), Adjutant-General to the Forces
• John Macdonald (British Army officer, born 1907) (1907–1979)
• John Macdonald (Australian Army officer) (1919–1996), University of New South Wales Regiment
• John Denis Macdonald (1826–1908), English naval surgeon and naturalist

Music

• John MacDonald (Canadian musician) (born 1948), Canadian–French horn player
• John-Angus MacDonald (active since 1997), Canadian musician and guitarist
• John Scantlebury Macdonald, real name of Harry Macdonough (1871–1931), Canadian singer and music recording pioneer
• John MacDonald of Inverness (1865–1953), Scottish bagpiper

Religion

• John MacDonald (bishop of Aberdeen) (1818–1889), Scottish Roman Catholic bishop
• John MacDonald (Gaelic Moderator) (1779–1849), Scottish minister of the Free Church of Scotland, known as the "Apostle of the North"
• John MacDonald (vicar apostolic) (1727–1779), Scottish Roman Catholic bishop
• John Hugh MacDonald (1881–1965), Canadian Roman Catholic prelate, Archbishop of Edmonton
• John Roderick MacDonald (1891–1959), Canadian Roman Catholic prelate, Bishop of Peterborough, Ontario

Sports

• John Macdonald (sportsman) (1861–1938), represented Scotland at both cricket and football
• John MacDonald (American football) (1885–1962), American football head coach for Boston University
• John MacDonald (canoeist) (born 1965), New Zealand Olympic canoer
• John MacDonald (footballer, born 1883) (1883–1915), Scottish footballer for Blackburn Rovers, Leeds City, Grimsby Town
• John Macdonald (footballer, born 1886) (1886–1960), Scottish footballer for Raith Rovers, Rangers, Liverpool, Newcastle United
• John MacDonald (footballer, born 1961), Scottish footballer for Rangers, Barnsley
• John MacDonald (ice hockey), Canadian ice hockey player who played for Destil Trappers in the Netherlands
• John MacDonald (racing driver) (born 1936), race car driver and motorcycle racer of Hong Kong
• Jack Macdonald (sportsman) (1907–1982), New Zealand Olympic rower
• John Macdonald (Canadian football) (born 1978), Canadian football defensive linemen
• John MacDonald (rugby union, born 1960), Irish rugby union international player
• John MacDonald (rugby union, born 1890) (1890–1980), Scottish rugby union player
• John MacDonald (rugby union, born 1938), Scottish rugby union player

Other uses

• John Cathanach MacDonald, 4th of Dunnyveg (died 1499)
• John Macdonald (psychiatrist) (1920–2007), New Zealand forensic psychiatrist who coined the MacDonald triad of sociopathy
• John S. MacDonald, co-founder of MacDonald Dettwiler
• John Smyth Macdonald (1867–1941), British physiologist
• John Graham MacDonald (1834–1918), explorer and pioneer in Queensland, Australia
• John B. Macdonald (1918–2014), president of the University of British Columbia

See also

• John McDonald (disambiguation)
• Jack MacDonald (disambiguation)