Cynaetha or Kynaitha, or Cynaethae or Kynaithai (Κύναιθαι), was a town in the north of ancient Arcadia, situated upon the northern slope of the Aroanian Mountains, which divided its territory from those of Cleitor and Pheneus. It was the northernmost town of Arcadia; the inhabitants of Cynaetha were the only Arcadians who lived beyond the natural boundaries of Arcadia. Their valley sloped down towards the Corinthian Gulf; and the river which flowed through it fell into the Corinthian Gulf a little to the east of Bura: this river was called in ancient times Erasinus or Buraicus, now the river of Vouraikos. The climate and situation of Cynaetha are described by Polybius as the most disagreeable in all Arcadia.