HMS Alderney was a 10-gun (later, 12-gun) Alderney-class sloop of the Royal Navy that saw active service during the Seven Years' War and the American Revolutionary War. Launched in 1757, she was principally deployed in the North Sea to protect British fishing fleets and merchant trade. In this capacity she captured two American privateers, Hawk in 1779 and the 12-gun Lady Washington in 1780. She was removed from Navy service at the conclusion of the American Revolutionary War, and sold into private hands at Deptford Dockyard on 1 May 1783. She became the whaler Alderney that operated between 1784 and 1797, when the Spaniards captured her off Chile.