HMS Conqueror was a 74-gun third-rate ship of the line of the Royal Navy, launched on 23 November 1801 at Harwich. She was designed by Sir John Henslow as part of the Middling class of 74s, and was the only ship built to her draught. Whereas the common class carried 28 18 pdrs on their upper gun decks, the middling class carried 30, and only 10 9 pdrs on their quarterdecks instead of the 12 of the common class. Conqueror was broken up in 1822.