Fasıllar is a village in Daday District, in Kastamonu Province, Türkiye. Fasıllar lies at 1,057 m above sea level, 2.5 km from the Küre mountains. It has 84 inhabitants. The nearest city is Kastamonu, 49 km to the east. Among the landmarks around are Bonita (7.1 km) and Mahmut Bey Mosque (40 km).