HMS Olympus was an Odin-class submarine, a class originally designed for the Royal Australian Navy to cope with long distance patrolling in Pacific waters. Olympus was built to the same design for the Royal Navy. She served from 1931-1939 on the China Station and 1939-1940 out of Colombo. In 1940 she went to the Mediterranean. She was sunk by a mine off Malta in May 1942.