Tatarchev Nunatak (Bulgarian: Татарчев нунатак, ‘Tatarchev Nunatak’ \ta-'tar-chev 'nu-na-tak\) is the rocky ridge rising to 645 m (central height) and 659 m (eastern one)[1] and horseshoe-shaped, extending 3.2 km in north-south direction and 2.2 km in east-west direction on Oscar II Coast in Graham Land. It is part of the glacial divide between Hektoria Glacier to the west and Brenitsa Glacier to the east. The feature is named after Hristo Tatarchev (1869-1952), a leader of the Bulgarian liberation movement in Macedonia.
Tatarchev Nunatak is located at -64.8964°N -61.5703°W, which is 3.65 km south of Mount Quandary, 5.75 km northwest of Reselets Peak, and 9.9 km east of Sekirna Spur. British mapping in 1978.