Francis Rawdon Moira Crozier (17 October 1796 – disappeared 26 April 1848) was an Irish officer of the Royal Navy and polar explorer who participated in six expeditions to the Arctic and Antarctic. In May 1845, he was second-in-command to Sir John Franklin and captain of HMS Terror during the Franklin expedition to discover the Northwest Passage, which ended with the loss of all 129 crewmen in mysterious circumstances.