Perperek Knoll (Perperekska Mogila \per-pe-'rek-ska mo-'gi-la\) is a 360 m peak in Vidin Heights on Varna Peninsula, Livingston Island in the South Shetland Islands, Antarctica. It has partly ice-free southeast slopes. The peak is named after the settlement of Perperek in the Rhodope Mountains site of the ancient town of Perperikon.
The knoll is located at which is 5.77 km north of Sliven Peak, 4.51 km northeast of Leslie Hill and 2.41 km southeast of Miziya Peak (Bulgarian topographic survey Tangra 2004/05, and mapping in 2005 and 2009).