Dört Eylül is a neighborhood in Buldan District, in Denizli Province, Türkiye. Dört Eylül lies in the Aydin mountains. It has 1,455 inhabitants. The nearest city is Sarayköy, 15.6 km to the southeast. Among the landmarks around are Hierapolis (32 km), Laodicea on the Lycus (34 km) and Tripolis on the Meander (11.1 km). Among the natural features are Güney Waterfall (23 km).