Mollymawk Island () is a small, tussock-covered island lying between Seaward Rock and Crescent Island in the north part of the Bay of Isles, South Georgia. It was charted in 1912-13 by Robert Cushman Murphy, American naturalist aboard the brig Daisy. Surveyed in 1929-30 by DI personnel and named in association with Albatross Island, Prion Island and other natural history names given in the Bay of Isles by Murphy in 1912-13. "Mollymawk" is a name for various medium sized albatross.
This article incorporates public domain material from the United States Geological Survey document "Mollymawk Island" (content from the Geographic Names Information System).