Dereköy is a village in Eynesil District, in Giresun Province, Türkiye. Dereköy lies at 297 m above sea level, in the Rize Dağları mountains. It has 349 inhabitants. The nearest city is Tirebolu, 26 km to the west. Among the landmarks around are Libiopolis (8.5 km) and Philocaleia (11.4 km).