Bayırköy is a village in Daday District, in Kastamonu Province, Türkiye. Bayırköy lies at 869 m above sea level, in the Küre mountains. The nearest city is Kastamonu, 26 km to the east. Among the landmarks around are Mahmut Bey Mosque (16.7 km), Germeçtepe Dam (12.3 km) and Bezirgan Dam (10.3 km).