John Halsted (1768 – 2 November 1830) was an officer of the Royal Navy who served during the American War of Independence and the French Revolutionary and Napoleonic Wars. Born into a naval family, Halsted went to sea at an early age with his father and at least one of his brothers. After a period of schooling he rejoined the navy and served aboard a number of ships and under a variety of notable commanders of the age, until reaching the rank of lieutenant shortly after the outbreak of the French Revolutionary Wars. He went out to the East Indies for much of them, serving onshore with troops and later commanding a sloop, before returning to Britain hoping to receive post-rank and the command of a frigate. He was disappointed, the Admiralty declined to confirm his appointment and he spent a