Alçılar is a village in Devrekani District, in Kastamonu Province, Türkiye. Alçılar lies at 1,206 m above sea level, in the Küre mountains. It has 103 inhabitants. The nearest city is Kastamonu, 44 km to the south. Among the landmarks around are Mahmut Bey Mosque (36 km), Beyler Dam (12.6 km) and Abonoteichos (26 km).