Altsek Nunatak (Nunatak Altsek \'nu-na-tak al-'tsek\) is a 170adj=midNaNadj=mid rocky hill projecting from the Murgash Glacier in Dryanovo Heights on Greenwich Island, Antarctica. The peak is named after Khan Altsek, whose Bulgars settled in Italy in the 7th century AD.
The peak is located at -62.4949°N -59.8786°W which is 1.96 km northeast of Yovkov Point, 740 m southeast of Lloyd Hill, 970 m east of Kotrag Nunatak, 1.6 km west by north of Tile Ridge and 2.5 km north-northwest of Kaspichan Point.
