Dereağzı is a neighborhood in Gevaş District, in Van Province, Türkiye. Dereağzı lies 2.7 km from the İhtiyarşahap Dağı mountains. It has 824 inhabitants (2022). The nearest city is Edremit, 26 km to the east. Among the landmarks around are Cathedral of the Holy Cross (6.0 km), Narekavank (5.3 km) and Karmravank (7.1 km).