Tercan (formerly Mama Hatun, and Derzene; Greek: Δερζηνή in the Byzantine era; Kurdish: Têrcan) is a town and district of Erzincan Province in the Eastern Anatolia region of Turkey. The district covers an area of 1,592 km2 (615 sq mi) and its total population is 20,072 of which 6,646 live in the town of Tercan.