Lumus Rock () is a rock located 4 nautical miles (7 km) west-northwest of Sooty Rock, marking the southwest extremity of Wilhelm Archipelago. Discovered by British Graham Land Expedition (BGLE), 1934–37, and named "Lumus Reef" after one of the BGLE cats, the only one to survive the Antarctic winter. The BGLE naming has been accepted because of long use. A change in generic term, from reef to rock, was made on recommendation by United Kingdom Antarctic Place-Names Committee (UK-APC) in 1971.
This article incorporates public domain material from the United States Geological Survey document "Lumus Rock" (content from the Geographic Names Information System).