Dereköy is a neighborhood in Koçarlı District, in Aydın Province, Türkiye. Dereköy lies at 463 m above sea level, in the Beşparmak mountains. It has 135 inhabitants. The nearest city is İncirliova, 28 km to the north. Among the landmarks around are Priene (39 km), Alinda (10.0 km) and Alabanda (19.9 km).