Karnıaçık is a village in Taşköprü District, in Kastamonu Province, Türkiye. Karnıaçık lies at 767 m above sea level, 0.1 km from the Ilgaz mountains. It has 245 inhabitants. The nearest city is Kastamonu, 25 km to the west. Among the landmarks around are Pompeiopolis (14.8 km), Mahmut Bey Mosque (32 km) and Karadere Dam (14.6 km).