Sumak is a village in Pertek District, in Tunceli Province, Türkiye. Sumak lies at 1,168 m above sea level, in the Munzur mountains. It has 83 inhabitants. The nearest city is Tunceli, 25 km to the north. Among the landmarks around are Harpoot (31 km), Uzunçayır Dam (10.7 km) and Pertek Castle (22 km).