Kestros or Kaystros () may refer to:

Kestros (weapon), a type of sling used to throw darts Kestros River, an ancient name of the Aksu River in Turkey a god of said river Kestros (Cilicia), a town of ancient Cilicia, later in Isauria Kestros (Pamphylia), a town of ancient Pamphylia, later in Isauria