HMS Amphion (P439), was an Amphion-class submarine of the Royal Navy, built by Vickers Armstrong and launched 31 August 1944. HMS Amphion, later S43, was the first of the class to be launched in August 1944. She was originally to be named as HMS Anchorite but their names were exchanged before launch. Of the class, only Amphion and HMS Astute were completed before the end of the war, and neither were involved in hostilities. In 1953 she took part in the Fleet Review to celebrate the Coronation of Queen Elizabeth II.