Yeniyurt Castle (tr|Yeniyurt Kalesi) is a castle ruin in Mersin Province, Turkey. The ancient name of the castle is not known. Yeniyurt is the name of a nearby village.
The castle is situated on a hill in the peneplane area in the north west of Erdemli district of Mersin Province at 36.6264°N 34.1303°W. The castle overviews the Kayacı valley and Limonlu River. The distance to Erdemli is and to Mersin is It is to the nearest sea side settlement, Ayaş.[1]
The castle, now mostly in ruins, is noticeable for its non-standard construction material. It was a Hellenistic castle built to control the valley during the ancient ages.[2] But later on it was reconstructed by the Byzantian Empire or the Cilician Armenia in the Medieval age. There are traces of three towers, a necropolis and a basilica as well as some houses.