Lozen Nunatak (, ) is a 440m hill in upper Huron Glacier, Livingston Island. It is part of a minor ridge in the north foothills of Tangra Mountains including also Erma Knoll and Aheloy Nunatak, and linked to Zograf Peak by Lozen Saddle. The hill was first visited on 17 December 2004 by the Bulgarian Lyubomir Ivanov from Camp Academia. It is named after the Lozen Monastery of St. Spas (Holy Saviour) in western Bulgaria.
