George Mackenzie (Royal Navy officer)

Vice-Admiral George Mackenzie (c. 1720 - 1780) was a Royal Navy officer who served as Commander-in-Chief, The Nore from 1774 to 1775.

Naval career
Mackenzie became commanding officer of the frigate HMS Amazon (1745) in July 1745 and then of the frigate HMS Tavistock (1756) in August 1745. Promoted to captain in January 1746, he commanded, successively, the frigate HMS Inverness (1746), the sixth-rate HMS Fowey (1749) and the fourth-rate HMS Sunderland (1724) and saw action in the Louisbourg Expedition. He went on to command the fifth-rate HMS Renown (1747) and saw action in the Raid on St Malo in June 1758, the invasion of Martinique in January 1759 and the invasion of Guadeloupe in spring 1759. After that he was given command of the fourth-rate HMS Defiance (1744) and took part in the siege of Havana in spring 1762. We went on to command the third-rate HMS Cornwall (1761) and then the third rate HMS Arrogant (1761). He became Commander-in-Chief Jamaica Station in August 1770 and then served as Commander-in-Chief, The Nore from January 1774 to 1775.

He was appointed Rear-Admiral of the Red in January 1778 and Vice-Admiral of the Blue in March 1779. His son, Thomas, also served as an admiral.