Muckle Bluff is a bluff 9km (06miles) west of Walker Point on the south coast of Elephant Island in the South Shetland Islands of Antarctica. It was mapped by the UK Joint Services Expedition, 1970-71. The descriptive name for this prominent feature was applied by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1971; muckle being an old Scottish word meaning large.