John Campbell
John Campbell may refer to:
Academia
- John Francis Campbell, scholar of Celtic folklore and language; inventor
- John Edward Campbell, mathematician credited for the Campbell-Hausdorff formula
- John Lorne Campbell, Scottish historian, farmer, environmentalist, and folklore scholar
- John R. Campbell, American dairy scientist and university administrator
- John Campbell (casting scientist), British engineer
- John Angus Campbell, retired American professor of rhetoric
- John Campbell (philosopher), professor of philosophy at the University of California
- John Y. Campbell, professor of economics at Harvard University
Business
- Sir John Campbell (farmer), Scottish farmer and businessman
- John Saxton Campbell, British seigneur and shipbuilder in Lower Canada
- John W. Campbell (financier), American financier
- John A. Campbell (lumber executive), Australian-American timber executive
Literature and journalism
- John Campbell (editor), pioneer colonial American journalist
- John Campbell (author), Scottish author
- Wal Campbell or John William Wallace Campbell, Australian anti-Catholic journalist
- John W. Campbell, American science fiction writer, editor of Analog Science Fiction and Fact
- John Campbell (biographer), British political biographer
- John Campbell (broadcaster), television and radio reporter in New Zealand
- John Campbell, author of ''Pictures for Sad Children''
Military
- John Campbell, 4th Earl of Loudoun, general in North America
- John Campbell, of Strachur, general at Pensacola in the West Florida province
- John Campbell of Stonefield, lieutenant–colonel at Mangalore
- John Campbell (British Army officer, died 1804), British colonel and lieutenant-governor of Plymouth
- John B. Campbell, soldier during the War of 1812
- John Campbell (Indian Army officer, born 1802), British general
- Sir John Campbell, 2nd Baronet, major-general, killed in attack upon the Redan at Sevastopol
- Sir John Campbell, 1st Baronet, major-general, R.A., served in Crimea, China, Afghan War, Zhob Valley
- John Hasluck Campbell, brigadier, Sutherland Highlanders, served in First World War
- John Vaughan Campbell, Victoria Cross recipient, brigadier-general, First World War, ADC to the King 1919–1938
- Jock Campbell (British Army officer) or John Charles Campbell, major-general and Victoria Cross recipient
- John F. Campbell (general), U.S. Army general
Music
- John Campbell (blues guitarist), American blues guitarist
- John Campbell (jazz pianist), American jazz pianist
- John Campbell, American musician, bassist for Lamb of God
- John Campbell (musical composer), American musical composer
Politics
Australia
- John Thomas Campbell, member of the New South Wales Legislative Council
- John Campbell (Australian politician), member of the New South Wales Legislative Council and the New South Wales Legislative Assembly
- John Dunmore Campbell, member of the Queensland Legislative Assembly
Canada
- John Campbell (Royal Navy officer), Commodore Governor for Newfoundland
- John Campbell (Upper Canada politician)
- John Campbell (London, Ontario politician), manufacturer and municipal politician in Ontario, Canada
- John Campbell (Nova Scotia politician), Conservative member of the Canadian Parliament from Nova Scotia of Digby
- John A. Campbell (Manitoba politician)
- John Malcolm Campbell
- John Murray Campbell, Alberta MLA
- John Campbell (Quebec politician), Liberal member of the Canadian Parliament from Quebec
- John Campbell (Ontario politician)
United Kingdom
- John Campbell, Earl of Atholl, Scottish nobleman
- Sir John Campbell of Cawdor (nobleman), Scottish nobleman
- John Campbell of Lundy, Scottish lawyer and courtier
- John Campbell, 3rd of Cawdor, Scottish nobleman and knight
- John Campbell, 1st Earl of Loudoun, Lord Chancellor of Scotland, president of the Privy Council
- John Campbell, 1st Earl of Breadalbane and Holland, Scottish MP for Argyllshire, 1669–1674
- John Campbell of Shankstown, Scottish soldier and member of the Parliament of Scotland
- John Campbell of Mamore, MP for Dunbartonshire, 1708–1722 and 1725–1727
- John Campbell, 2nd Earl of Breadalbane and Holland, Lord Lieutenant of Perthshire, Chief Justice in Eyre
- John Campbell (Edinburgh MP), Scottish politician
- John Campbell, 2nd Duke of Argyll, Scottish soldier, Lord Steward, Lord Lieutenant of Surrey
- John Campbell, 4th Duke of Argyll, Scottish Whig politician
- John Campbell of Cawdor, British MP for Pembrokeshire 1727–1747, Inverness Burghs 1754–1761, Corfe Castle 1762–1768
- John Campbell, 3rd Earl of Breadalbane and Holland, Scottish MP for Saltash and Ordford, Master of the Jewel Office, Vice–Admiral of Scotland
- John Campbell, 5th Duke of Argyll, Scottish MP for Glasgow Burghs and for Dover, Lord Lieutenant of Argyllshire
- John Campbell (1750–1826), Scottish lawyer and politician, MP for Ayr Burghs 1794–1807
- John Campbell, 1st Baron Cawdor, British politician, MP for Nairnshire 1777–1780 and for Cardigan Boroughs 1780–1796
- John Campbell, 1st Marquess of Breadalbane, also 4th Earl of Breadalbane and Holland
- John Campbell (1770–1809), Scottish politician, MP for Ayr Burghs 1807–1809, first husband of Lady Charlotte Bury
- John Campbell, 7th Duke of Argyll, Scottish MP for Argyllshire 1799–1820, Keeper of the Great Seal of Scotland
- John Campbell, 1st Baron Campbell, British MP for Stafford, Dudley and Edinburgh, Lord Chief Justice and Lord Chancellor of England
- John Campbell, 1st Earl Cawdor, British earl and MP for Carmarthen from 1813 to 1821
- John Campbell, 2nd Marquess of Breadalbane, British MP for Okehampton and for Perthshire, Lord Chamberlain of the Household
- John Campbell (1798–1830), MP for Dunbartonshire, 1826–1830
- John Campbell-Wyndham, known as John Henry Campbell, Member of the United Kingdom Parliament for Salisbury, 1843–1847
- John Campbell, 2nd Earl Cawdor, British politician, MP for Pembrokeshire 1841–1860
- John Campbell, 9th Duke of Argyll, Scottish MP for Argyllshire 1868–1878 and Manchester South 1895–1900, Governor General of Canada 1878–1883
- John Campbell (Irish surgeon), Member of the Northern Ireland Parliament
- John Gordon Drummond Campbell, British Member of Parliament for Kingston upon Thames, 1918–1922
- John Campbell (Irish politician), Member of the United Kingdom Parliament for South Armagh 1900–1906
- John Campbell (Labour politician), Northern Irish trade unionist and Northern Ireland Labour Party councillor
- J. R. Campbell (communist), Scottish communist activist and newspaper editor
- John Dermot Campbell, Northern Irish businessman and Ulster Unionist MP
- John Campbell, 5th Earl Cawdor, Scottish peer
United States
- John Campbell (1765–1828), congressman from Maryland
- John Wilson Campbell, U.S. federal judge & congressman from Ohio
- John Campbell (Arkansas politician) state senator and delegate at the secession convention
- John Campbell (South Carolina politician), congressman from South Carolina
- John Campbell (US Treasurer), fifth Treasurer of the United States
- John Hull Campbell, congressman from Pennsylvania
- John Archibald Campbell, U.S. Supreme Court justice & Confederate official
- *SS John A. Campbell, a Liberty ship
- John P. Campbell Jr., congressman from Kentucky
- John Arthur Campbell, Virginia lawyer and politician
- John G. Campbell, U.S. territorial delegate from Arizona
- John Allen Campbell, Wyoming's first provisional governor
- John T. Campbell, 19th-century California state legislator with Civil War army service
- John Tucker Campbell, secretary of state of South Carolina
- John Campbell (diplomat), diplomat
- John F. Campbell (politician), Vermont state senator
- John Campbell (California politician), congressman from California
- John M. Campbell (judge), judge on the Superior Court of the District of Columbia
Other countries
- Sir John Campbell, of Airds, lieutenant-governor of St Vincent 1845–1853
- Sir John Logan Campbell, figure in the history of Auckland, New Zealand
Sports
- John Argentine Campbell, Scottish rugby union player
- John Campbell (American football), American football player
- John Campbell (Australian rower), Australian Olympic rower
- John Campbell (baseball), Washington Senators pitcher
- John Campbell (cricketer), Jamaican cricketer
- John Campbell (curler), New Zealand curler and curling coach.
- John Campbell (footballer, born 1850s), Glasgow South Western and Scotland winger
- John Campbell (footballer, born 1869), Sunderland and Newcastle United forward
- John Campbell (footballer, born 1872), Celtic and Aston Villa forward
- John Campbell (footballer, born 1877), Blackburn Rovers, Rangers and Scotland forward
- John Campbell (footballer, born 1988), English footballer
- John Campbell (harness racing), Canadian harness racing driver
- John Campbell (rower), British rower and Olympic silver medalist
- John Campbell (rugby), Australian rugby league footballer
- John Campbell (runner), New Zealand long-distance runner
- John Campbell (skier), alpine skier from the Virgin Islands
- John Campbell (snooker player), Australian snooker player
- John Campbell (shot putter), winner of the 1985 NCAA DI outdoor shot put championship
- John Cyril Campbell, English athlete and football coach
Religion
- John Campbell (17th-century minister), prisoner on the Bass Rock
- John Campbell (bishop of Argyll), Scottish clergyman
- John Campbell of Sorn, 17th-century Scottish minister
- John Campbell (missionary), Scottish missionary in South Africa
- John Campbell (19th-century minister), minister of Whitefield's Tabernacle, Moorfields, London
- John Nicholson Campbell, Presbyterian clergyman who served as Chaplain of the United States House of Representatives
- John McLeod Campbell, Scottish minister and theologian
- John McLeod Campbell (priest), English Anglican priest
- John Campbell (moderator), Church of Scotland minister and Moderator of the General Assembly
Other people
- John Campbell, Lord Stonefield Scottish judge
- John Campbell of Clathick, Scottish merchant and philanthropist, Lord Provost of Glasgow
- John Henry Campbell (painter), Irish painter and father of Cecilia Margaret Nairn
- John Campbell (Scottish surgeon), president of the Royal College of Surgeons of Edinburgh
- John Gregorson Campbell, Scottish folklorist and Free Church minister
- John Hodgson Campbell, British painter
- John Campbell (architect), practised in New Zealand
- John C. Campbell, American educator known for surveying life in the Appalachians
- John H. Campbell, American judge, associate justice on Arizona's territorial supreme court
- John Patrick Campbell,, Belfast artist and illustrator
- John Menzies Campbell, Scottish dentist and dental historian
- John Maurice Hardman Campbell, British physician, cardiologist, and medical journal editor
- John Campbell (YouTuber), British social media influencer and retired nurse educator
- John Campbell or Greg Abbey, American voice actor
- Constable John Campbell, awarded the George Medal for his part in foiling the Linwood bank robbery