Cyptasia or Kyptasia (Ancient Greek: Κυπτασία) was a town on the Black Sea coast of ancient Paphlagonia. The name appears as Cloptasa in the Tabula Peutingeriana was 7 Roman miles from Sinope on the road to Amisus.

It is located near Eren Boğazı in Asiatic Turkey.

 This article incorporates text from a publication now in the public domain: Smith, William, ed. (1854–1857). "Cyptasia". Dictionary of Greek and Roman Geography. London: John Murray.

41°55′42″N 35°04′07″E / 41.92842°N 35.068707°E / 41.92842; 35.068707