Cape du Couedic is a headland in the Australian state of South Australia located on the southwest tip of Kangaroo Island in the locality of Flinders Chase. It was named after a French naval officer, Charles Louis du Couëdic de Kergoualer, by the Baudin expedition to Australia during January 1803. It is the site for the Cape du Couedic Lighthouse. It is currently located within the Flinders Chase National Park.