Sarnıç is a village in Gerze District, in Sinop Province, Türkiye. Sarnıç lies at 464 m above sea level, in the Küre mountains. It has 300 inhabitants. The nearest city is Sinop, 29 km to the north. Beaches nearby: Cayva (8.3 km), Cayva (8.4 km). Among the landmarks around are Carussa (8.9 km).