HMS Courageux was a 74-gun third rate ship of the line of the Royal Navy, launched on 26 March 1800 at Deptford. She was designed by Sir John Henslow as one of the large class 74-gun ships, and was the only ship built to her draught. Unlike the middling and common class 74-gun ships, which carried 18-pounder long guns, as a large 74-gun ship, Courageux carried 24-pounders on her upper gun deck.