Cormorant Island is a 10 ha island lying in Bismarck Strait 1 km south of Anvers Island, 4 km (2.5 mi) east-south-east of Bonaparte Point, in the Palmer Archipelago of Antarctica. It lies some 5 km to the south-east of the United States' Palmer Station in Arthur Harbour on Anvers Island. It was shown on an Argentine government chart of 1954, but not named.