Ömerdüz is a village in Ayancık District, in Sinop Province, Türkiye. Ömerdüz lies at 392 m above sea level, in the Küre mountains. It has 45 inhabitants. The nearest city is Boyabat, 50 km to the southeast. Beaches nearby: Ayancık (9.9 km), Ayancık Köyü (10 km), Ali Köyü (13 km).