López Nunatak is a steep-sided granitic nunatak, 275m (902feet) high, forming the northern extremity of the Breznik Heights, Greenwich Island in the South Shetland Islands, Antarctica and overlooking Fuerza Aérea Glacier to the south-southwest, and Ash Point and the Chilean Captain Arturo Prat Base to the northwest.
The feature was charted by the 1947 Chilean Antarctic Expedition and subsequently named after First Lieutenant Sergio López Angulo, Communications Officer in the expedition frigate Iquique.
The peak is located at -62.4827°N -59.6419°W which is 4.38 km northwest of Bogdan Ridge and 1.87 km north-northeast of Rousseau Peak (British mapping in 1968, and Bulgarian in 2005 and 2009).
