Kovaçayır is a village in Boyabat District, in Sinop Province, Türkiye. Kovaçayır lies at 1,092 m above sea level, in the Ilgaz mountains. It has 63 inhabitants. The nearest city is Boyabat, 21 km to the east. Among the landmarks around are Pompeiopolis (27 km) and Boyabat Castle (19.7 km).