Demirce is a village in Daday District, in Kastamonu Province, Türkiye. Demirce lies at 1,271 m above sea level, in the Küre mountains. It has 158 inhabitants. The nearest city is Kastamonu, 42 km to the east. Among the landmarks around are Mahmut Bey Mosque (33 km), Bezirgan Dam (12.7 km) and Bonita (14.6 km).