John Armstrong may refer to:
Politicians John Alexander Macdonald Armstrong (1877–1926), Canadian politician John Armstrong (Australian politician) (1908–1977) John Armstrong (New Zealand politician) (1935–2018) John Armstrong Jr. (1758–1843), soldier and U.S. Secretary of War John Armstrong Sr. (1717–1795), American general and Continental Congressman John Franklin Armstrong (1819–1887), schoolteacher and Texas state representative John Armstrong (Irish politician), MP for Fore
Religion John Armstrong (archbishop of Armagh) (1915–1987), Anglican bishop John Armstrong (bishop of Grahamstown) (1813–1856), Anglican bishop John Armstrong (bishop of Bermuda) (1905–1992), Anglican bishop John Armstrong (dean of Kilfenora) (1792–1856), Anglican priest in Ireland
Sports Jock Armstrong (born 1970), Scottish rally driver John Armstrong (cricketer) (born 1981), England John Armstrong (footballer, born 1890) (1890–1950), England John Armstrong (footballer, born 1936), Scotland John Armstrong (footballer, born 1987), Scotland John Armstrong (rugby league), Australia John Lee Armstrong (1932–2012), American football player and coach John Armstrong (American football) (born 1963), American football defensive back Johnny Armstrong (1897–1960), American football player
Others John Armstrong (architect) (1857–1941), Scottish architect John Armstrong (artist) (1893–1973), British artist and muralist John Armstrong (British Army officer) (1674–1742), Surveyor General John Armstrong (British writer/philosopher) (born 1966), British writer and philosopher John Armstrong (Carolina) (1735–1784), American soldier and land registrar John Armstrong (of Carrick) (1909–1984), farmer and musician from Northumberland John Armstrong (comics) (died 2018), British artist John Armstrong (frontiersman) (1755–1816), Pennsylvania and Ohio John Armstrong (journalist/poet) (1771–1797), Scotland John Armstrong (model railroader) (1920–2004), US John Armstrong (physician) (1784–1829), England John Armstrong (poet) (1709–1779), Scotland C. A. J. ("John") Armstrong (1909–1994), British medieval historian John Alexander Armstrong (1922–2010), professor of political science at University of Wisconsin-Madison John Archibald Armstrong (1917–2010), Canadian business executive John Barclay Armstrong (1850–1913), Texas Ranger and U.S. Marshal John S. Armstrong (1850–1908), developer, Texas John Armstrong (engineer) (1775–1854), Britain John Armstrong, New Zealand Army, made calculations for the Te Rata Bridge John Eric Armstrong (born 1973), American serial killer John W. Armstrong, British naturopath who popularized urine therapy
See also Armstrong (surname) Jack Armstrong (disambiguation) "Johnnie Armstrong", a folk ballad about a Scottish raider and folk-hero