Demirçay is a neighborhood in Söke District, in Aydın Province, Türkiye. Demirçay lies at 477 m above sea level, in the Beşparmak mountains. It has 225 inhabitants. The nearest city is Söke, 22 km to the northwest. Among the landmarks around are Priene (28 km), Temple of Artemis (40 km) and Ephesus (40 km).