Jasonia or Iasonia (), also Iasonia Akropolis (), was a Greek AcropolisPseudo Scylax, Periplous, §88 on the Black Sea coast of ancient Pontus.Periplus of Pseudo-Scylax, 88. It was located on Cape Jasonium.

The exact site of the place is unlocated. Pliny the Elder also talks about a river called Jason located near another river called Melantio, between the cities of Ambiso and Farnacia.

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