Beadnos Nunatak (Bulgarian: text=нунатак Беаднос|italic=no, ‘Nunatak Beadnos’ \'nu-na-tak be-'ad-nos\) is the partly ice-free hill of elevation 2190 m[1] projecting from the ice cap west of north-central Sentinel Range in Ellsworth Mountains, Antarctica. It is named after the medieval fortress of Beadnos in Southern Bulgaria.
Beadnos Nunatak is located at -77.9664°N -87.2172°W, which is 6.64 km southeast of Helfert Nunatak, 20.78 km west-southwest of Mursalitsa Peak, 29 km west of Mount Dalrymple and 9 km northwest of Kovil Nunatak. US mapping in 1961.