Olukbaşı is a village in Durağan District, in Sinop Province, Türkiye. Olukbaşı lies at 650 m above sea level, in the Ilgaz mountains. It has 772 inhabitants. The nearest city is Boyabat, 21 km to the west. Among the landmarks around are Boyabat Dam (4.7 km) and Dodurga Dam (16.2 km).