Üçağıl is a village in Cide District, in Kastamonu Province, Türkiye. Üçağıl lies at 721 m above sea level, in the Küre mountains. It has 570 inhabitants. The nearest city is Kastamonu, 74 km to the southeast. Among the landmarks around are Carambis (17.1 km) and Kerempe Lighthouse (16.5 km). Among the natural features are Dağlı Kuylucu Cave (14.1 km).