Demirdağ is a village in Divriği District, in Sivas Province, Türkiye. Demirdağ lies at 1,051 m above sea level, in the Deli Dağ mountains. The nearest city is Sivas, 101 km to the west. Among the landmarks around are Divriği Great Mosque and Hospital (6.2 km) and Aşağı Hamam (6.0 km).