Three vessels of the Royal Navy have borne the name HMS Thorn:
- HMS Thorn (1779) was a 14-gun sloop launched in 1779 that two American frigates, USS Deane and USS Boston captured on 25 August 1779.[1] She became an American privateer with a number of successful engagements and prizes to her name.[2] Arethusa captured her on 20 August 1782.[3] She then returned to service in the Royal Navy, serving until 1816 when she was sold.[4]
- HMS Thorn (1900) was a destroyer launched in 1900 and broken up in 1919.[5]
- HMS Thorn (N11) was a submarine launched in 1941 and sunk in the Mediterranean in 1942.