Cone Nunatak () is a nunatak, high, which appears conical on its north side but has brown rock cliffs on its south face, lying south-southeast of Buttress Hill on the Tabarin Peninsula, at the northeast extremity of the Antarctic Peninsula. It represents a volcanic vent of the James Ross Island Volcanic Group.
The descriptive name was applied by the Falkland Islands Dependencies Survey following their survey of the area in 1946.