Topçu is a neighbourhood in the municipality and district of Tarsus, Mersin Province, Turkey.Mahalle, Turkey Civil Administration Departments Inventory. Retrieved 12 July 2023. Its population is 87 (2022). It is situated to the north of Çukurova (Cilicia of the antiquity) and to the northeast of Tarsus. It lies away from Tarsus and away from Mersin.

References