Hyrcanis or Hyrkaneis, also known as Hyrcania (Ancient Greek: Ὑρκανία), was a Roman and Byzantine-era city[1] and bishopric in ancient Lydia, now in western Turkey. It was situated in the Hyrcanian plain (τὸ Ὑρκάνιον πεδίον), which is said to have derived its name from a colony of Hyrcanians being settled here by the Persians.[2][3] They were afterwards mingled with some Macedonians, who also settled in this district, whence they are called by Pliny the Elder and Tacitus "Macedones Hyrcani."[4][5][6][7] The city minted its own coins.[8][9]
Its site is located west of Halit Paşa in Asiatic Turkey,[10][11] south of Çamlıyurt.
The city was also the seat of an ancient bishopric. Known bishops include: