John Sinclair
John Sinclair may refer to:
Politicians
- Sir John Sinclair, 1st Baronet, politician and writer on agriculture and finance
- John Sinclair , MLA for North Melbourne
- John Mitchell Sinclair, South Australian politician
- Sir John Sinclair, 3rd Baronet, Scottish politician and landowner
- John Sinclair , mayor of Brisbane
- John Sinclair , Liberal MP for Ayr Burghs
- John Howard Sinclair, Canadian politician
- John Sinclair , member of the New Zealand Legislative Council
- John Sinclair, 1st Baron Pentland, Scottish politician
- John Ewen Sinclair, Canadian politician
- John William Sinclair, politician in Ontario, Canada
- John Sinclair, 3rd Viscount Thurso, British Member of Parliament for Caithness and Sutherland
Music and poetry
- John Sinclair , American poet and political activist
- John Sinclair , British musician, played with Ozzy Osbourne and Uriah Heep
- Yasus Afari, Jamaican dub poet, born John Sinclair
- Johnny Sinclair, musician in the bands The [Pursuit of Happiness |The Pursuit of Happiness] and Universal Honey
- "John Sinclair", a song by John Lennon on the Some [Time in New York City] album
Actors
- John Sinklo, sometimes known as John Sinclair, English renaissance actor
- John West Sinclair, American silent-screen actor
- John Gordon Sinclair, Scottish actor
Others
- John Sinclair, 3rd Earl of Caithness, Scottish nobleman
- John Sinclair , Ordinary Lord and later Lord President in the Court of Session
- John Sinclair, Master of Caithness, Scottish nobleman
- John Sinclair, 10th Lord Sinclair, Scottish nobleman
- John Sinclair, 23rd Lord Herdmanston, Scottish noble
- John Sinclair, 8th Earl of Caithness, Scottish nobleman
- John Sinclair, Lord Murkle, Scottish judge
- John Sinclair, 11th Earl of Caithness, Scottish noble
- John Sinclair , Scottish Archdeacon of Middlesex
- John Sinclair , Canadian clergyman and interpreter among the Cree in the 19th century
- John Sinclair , New Zealand carpenter, builder, station manager and harbourmaster
- John Sinclair , British clergyman, Archdeacon of Cirencester
- John Sinclair , British physician, Chief Medical Officer to the General Post Office
- John Houston Sinclair, British civil servant in Zanzibar
- Sir John Sinclair , British Army general, head of the Secret Intelligence Service
- John S. Sinclair, American lawyer and financier
- John Sinclair , Scottish Lord Lieutenant
- John McHardy Sinclair, British linguist
- John Henderson Sinclair, British scholar and academic
- John Sinclair , Australian environmentalist
- Jackie Sinclair, Scottish footballer
- John Sinclair , Australian rules footballer for Essendon
- John Sinclair , fictional protagonist of a popular German "penny dreadful"
- John Sinclair
- John H. Sinclair , American law enforcement officer from Vermont