Mescitdüzü is a village in Erfelek District, in Sinop Province, Türkiye. Mescitdüzü lies at 300 m above sea level, in the Küre mountains. It has 272 inhabitants. The nearest city is Sinop, 29 km to the northeast. Beaches nearby: Harzana (13 km). Among the landmarks around are Erfelek Dam (7.3 km) and Alaaddin Mosque (29 km). Among the natural features are Tatlıca Waterfalls (8.8 km).