Aşağıköy is a village in Ulus District, in Bartın Province, Türkiye. Aşağıköy lies at 369 m above sea level, in the Küre mountains. It has 356 inhabitants. The nearest city is Bartın, 25 km to the west. Among the landmarks around are Clitae (11.8 km) and Cromna (26 km).