Kaloyan Nunatak (pronounced ka-lo-'ya-nov 'nu-na-tak\) is a conspicuous nunatak in the Tangra Mountains. It is named after Czar Kaloyan of Bulgaria, 1197-1207 AD.
Kaloyan Nunatak rises to approximately 400 m in Delchev Ridge, Tangra Mountains, on eastern Livingston Island in the South Shetland Islands, Antarctica. It is situated next northeast of Sozopol Gap, 1.81 km east-northeast of Elena Peak, 1.53 km west-southwest of Mesta Peak and 3.32 km west-southwest of Renier Point. The peak surmounts Pautalia Glacier to the south, and Sopot Ice Piedmont to the west, north, and northeast.
It was mapped in 2005 and 2009 from the Tangra 2004/05 topographic survey, and has since been registered in the SCAR Composite Antarctic Gazetteer.
Kaloyan Nunatak is located at 62°37′23.8″S 59°51′48″W / 62.623278°S 59.86333°W.