John Barclay may refer to:
Religion John Barclay (Berean) (1734–1798), Scottish theological writer John Barclay (clergyman) (1795–1826), Canadian Church of Scotland clergyman John M. G. Barclay (born 1958), theologian and professor
Sports John Barclay (cricketer) (born 1954), English/Hong Kong cricketer John Barclay (rugby union) (born 1986), Scottish rugby union player
Others John Barclay (poet) (1582–1621), Scottish satirist and Latin poet John Barclay (anatomist) (1758–1826), Scottish anatomist John Barclay, Captain in Danish-Norwegian military, 1643 to 1645, thought to have been the first male member of Clan Barclay John Barclay (mayor) (1749–1824), American soldier, politician, and jurist; mayor of Philadelphia in 1791 John Barclay, survivor of the shipwreck of HMS Birkenhead in 1852 John Barclay (Royal Marines officer) (1741–1823), British Royal Marines general John Barclay (New Jersey politician) ( 1650–1731), Scottish Quaker and politician
See also John Barclay Armstrong (1850–1913), Texas ranger John Berkeley (disambiguation)