Sir Lawrence William Halsted GCB (2 April 1764 – 22 April 1841) was an officer of the Royal Navy who served during the American War of Independence and the French Revolutionary and Napoleonic Wars. Halsted was the son of a naval officer and served with his father during the first years of the war in America. After his father's death he served under Captain Richard Onslow and was present at the engagements with the Comte d'Estaing and the Comte de Grasse in the West Indies and off the coast of North America. He survived various battles and a hurricane in the Atlantic in 1782, and by the end of the wars had risen to lieutenant.