Callistratia or Kallistratia () was a town on the Black Sea coast of ancient Paphlagonia, at a distance of 20 stadia east of (modern Kerempe Burnu).Marcian of Heraclea, Periplus, p. 73. It was also called Marsilla or Marsylla, according to the anonymous Periplus.
Its site is tentatively located near Kışla in Asiatic Turkey.
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