Kozluçay is a village in Devrek District, in Zonguldak Province, Türkiye. Kozluçay lies in the Akçakoca Dağları mountains. It has 252 inhabitants. The nearest city is Devrek, 13.2 km to the northeast. Among the landmarks around are Heraclea Pontica (42 km) and Köprübaşı Dam (15.8 km).