Brigadier Sir Gregor MacGregor, 6th Baronet (22 December 1925 – 30 March 2003) was a British Army officer and Scottish clan chief. He succeeded his father, , and became the 23rd Chief of Clan Gregor from 1958 until his death. Having served as an officer of the Scots Guards, he was Defence and Military Attaché to Greece between 1975 and 1978.