HMS Dorsetshire (pennant number 40) was a heavy cruiser of the County class of the Royal Navy, named after the English county (now usually known as Dorset). She was launched on 29 January 1929 at Portsmouth Dockyard, UK. During the Second World War, she was last commanded by Captain Augustus Agar V.C.. The Dorsetshire was sunk by Japanese dive bombers in the Indian Ocean in 1942.