Tombul is a village in Erfelek District, in Sinop Province, Türkiye. Tombul lies at 347 m above sea level, in the Küre mountains. It has 189 inhabitants. The nearest city is Sinop, 28 km to the northeast. Among the landmarks around are Carussa (22 km), Alaaddin Mosque (28 km) and Erfelek Dam (14.1 km). Among the natural features are Tatlıca Waterfalls (13.2 km).