HMS Swiftsure was a 74-gun third-rate ship of the line of the Royal Navy, launched from Bucklers Hard on 23 July 1804. She fought at Trafalgar. Coincidentally the French 74-gun ship Swiftsure also took part in the battle; she had originally been a British ship that the French had captured in 1801. This Swiftsure became a receiving ship in 1819, In September 1844, she heeled over and sank at Portchester, Hampshire. In November 1844, she was in use as a target ship by HMS Excellent. She was sold out of the service in 1845.