Ertaş is a village in Daday District, in Kastamonu Province, Türkiye. Ertaş lies at 1,211 m above sea level, 0.7 km from the Küre mountains. It has 52 inhabitants. The nearest city is Kastamonu, 34 km to the east. Among the landmarks around are Mahmut Bey Mosque (29 km) and Bezirgan Dam (4.1 km).