Admiral Sir William Domett, GCB (1752 – 19 May 1828) was a senior officer of the British Royal Navy who saw extensive service during the American Revolutionary, French Revolutionary and Napoleonic Wars. Throughout his career, Domett was under the patronage of Alexander Hood, later Lord Bridport. During his service Domett was appointed as flag captain by several admirals, and saw action numerous times in this capacity, including seven years in command of HMS Royal George.