Gertus or Gertous (Ancient Greek: Γερτοῦς[1]) was an ancient town in the southern Illyrian region of Dassaretia, mentioned by Polybius in the 2nd century BC in the accounts of the Illyrian Wars and Macedonian Wars.
[2][3][4] The location of the ancient town is still unknown.
[4][5] It was probably situated between Lychnidus and Antipatrea.
[6] Along with Antipatrea, Chrysondyon and Creonion, Gertus was one of the Dassaretan towns (also described as castella) around which the Illyrian dynast Skerdilaidas and the Macedonian king Philip V fought in 217 BC.
[2][5] The settlement of Gertus was evidently walled.