In Greek mythology, Phineus or Phineas, was a king of Salmydessus in Thrace and seer, who appears in accounts of the Argonauts' voyage. Some accounts make him a king in Paphlagonia or in Arcadia.

Thrace is a geographical and historical region in Southeast Europe. Bounded by the Balkan Mountains to the north, the Aegean Sea to the south, and the Black Sea to the east, it comprises present-day southeastern Bulgaria, northeastern Greece, and the European part of Turkey, roughly the Roman Province of Thrace. Lands also inhabited by ancient Thracians extended in the north to modern-day Northern Bulgaria and Romania and to the west into Macedonia.