Mellona Rocks is a group of scattered rocks lying at the north entrance to Nelson Strait in the South Shetland Islands, Antarctica and extending 1.7 by 0.9 km (1.06 by 0.56 mi). The area was known to the early 19th-century sealers and sometimes included under the names 'Heywood Islands' or 'Powels Islands'. The feature is named after the British sealing ship Mellona under Captain Thomas Johnson that operated in the South Shetlands in 1821–22.