John Douglas
John Douglas may refer to:
Politics and war
- John Douglas, Lord of Balvenie, Scottish soldier
- John Douglas, 2nd Earl of Morton, Scottish nobleman
- John Douglas Sr., politician in Maryland
- John Douglas of Broughton, Member of Parliament for Peebleshire 1722–32
- Sir John Douglas, 3rd Baronet, of Kelhead, Member of Parliament for Dumfriesshire, 1741–47
- John Erskine Douglas, Royal Navy admiral
- John Douglas (Royal Marines officer), British officer involved in a scandal regarding an allegedly illegitimate child born to the Princess of Wales, Caroline of Brunswick
- John Douglas (died 1838), Tory politician, Member of Parliament for Orford 1818–21 and for Minehead 1822–26
- John Douglas, 7th Marquess of Queensberry, Scottish Whig politician
- John Douglas (British Army officer), British general
- John Douglas (Connecticut politician), member of the General Court of the Colony of Connecticut in 1669–70
- John Douglas (Queensland politician), Premier of Queensland
- John Douglas (colonial administrator), Irish governor of Ceylon
- John Douglas, 9th Marquess of Queensberry, Scottish nobleman
- John Carey Douglas, politician in Nova Scotia, Canada
- John Henry Douglas, politician in Ontario, Canada
- John Taylor Douglas, politician in Saskatchewan, Canada
- John Douglas (Irish politician), senator 1954–57
- John Douglas, 21st Earl of Morton, Scottish peer and landowner
- John St Leger Douglas, British member of parliament for Weobley
Religion
- John Douglas (archbishop of St Andrews), Scottish archbishop and Chancellor of the University of St. Andrews
- John Douglas (bishop of Salisbury), Scottish bishop and literary critic
- John Waldo Douglas, American minister
- John Albert Douglas, Church of England priest
Sport
- Johnny Douglas, English cricket captain and 1908 Olympic middleweight boxing champion
- John Douglas (baseball), American baseball player
- John Douglas (boxer), Guyanese boxer
- John Douglas (rugby union), Scottish international rugby player
- John Douglas (fencer), Australian Olympic fencer
- John Douglas (defensive back), American football player
- John Douglas (linebacker), American football player
- John Douglas (sportsman), Australian rules footballer and cricketer
- John Douglas (basketball), American basketball player
- John Douglas (footballer), English footballer
- Jon Douglas, American tennis and American football player
Other
- John Douglas (lithotomist), Scottish surgeon
- John Douglas (Scottish architect)
- John William Douglas, English entomologist
- John Douglas (English architect), British architect
- Johnny Douglas (conductor), English composer, musical director and string arranger
- John W. Douglas, American attorney and civil rights advocate
- John E. Douglas, FBI criminal profiler
- John Douglas (conductor), American conductor
- John Primrose Douglas, honorary surgeon to the Queen
- Jacksfilms, American Internet personality