HMS Pennywort was a that served with the Royal Navy during the Second World War. She served as an ocean escort in the Battle of the Atlantic.
On 17 March 1943, she picked up 70 survivors from James Oglethorp, an American merchant torpedoed by the and Elin K., a Norwegian merchant torpedoed and sunk by . On 18 March 1943, she, along with picked up 54 survivors from Canadian Star, a British merchant torpedoed and sunk by . On 12 August 1944, she, along with, picked up 59 survivors from Orminster, a British merchant sunk by .[1]