Henry Sinclair may refer to:
Henry I Sinclair, Earl of Orkney (1345–1400), Scottish-Norwegian nobleman Henry II Sinclair, Earl of Orkney (c. 1375–1422), Scottish-Norwegian nobleman Henry Sinclair, 4th Lord Sinclair (died 1513), Scottish nobleman Henry Sinclair (bishop) (1508–1565), lord-president of the court of session and bishop of Ross Henry Sinclair, 6th Lord Sinclair (died 1601), Scottish nobleman Henry Sinclair, 7th Lord Sinclair (died 1602), Scottish nobleman Henry Daniel Sinclair (1818–1868), explorer and founder of Bowen, Queensland, Australia Henry Harbinson Sinclair (1848-1914), businessman of California Henry Sinclair, 2nd Baron Pentland (1907–1984), Scottish peer
See also Harry Sinclair (disambiguation)