Admiral of the Fleet Sir George Cockburn, 10th Baronet, was a British Royal Navy officer. As a captain he was present at the Battle of Cape St Vincent in February 1797 during the French Revolutionary Wars and commanded the naval support at the reduction of Martinique in February 1809 during the Napoleonic Wars. He also directed the capture and Burning of Washington on 24 August 1814 as an advisor to Major General Robert Ross during the War of 1812. He went on to be First Naval Lord and in that capacity sought to improve the standards of gunnery in the fleet, forming a gunnery school at Portsmouth; later he ensured that the Navy had the latest steam and screw technology and put emphasis on the ability to manage seamen without the need to resort to physical punishment.

Admiral of the Fleet is a five-star naval officer rank and the highest rank of the Royal Navy, formally established in 1688. The five-star NATO rank code is OF-10, equivalent to a field marshal in the British Army or a Marshal of the Royal Air Force. Apart from honorary appointments, no new admirals of the fleet have been named since 1995, and no honorary appointments have been made since 2014.