In Greek mythology, the Doliones or Dolionians were the people living on the coast of the Propontis (northwestern Asia Minor), visited by the Argonauts. They were ruled by Cyzicus, son of Aeneus and Aenete.
After the departure of the Argonauts in Lemnos, they landed in the island of the Doliones of whom Cyzicus was the king. Cyzicus welcomed the Argonauts on their journey to Colchis and received them with generous hospitality. But after their departure, a storm drove them back to the Cyzicene coast at night. With neither the Argonauts nor King Cyzicus and the Doliones recognizing one another, each mistook the other as an enemy and battle ensued (the Doliones thought they were Pelasgian army who constantly harassed them). The Argonauts slew many natives, among the rest was King Cyzicus who was himself killed either by Jason or Heracles.