Acısu is a village in Gerze District, in Sinop Province, Türkiye. Acısu lies at 577 m above sea level, in the Küre mountains. It has 141 inhabitants. The nearest city is Sinop, 28 km to the north. Beaches nearby: Cayva (3.7 km), Cayva (3.9 km). Among the landmarks around are Carussa (4.4 km) and Gerze Lighthouse (5.2 km).