Cordulegaster helladica (Greek Goldenring) is a species endemic to Greece. Its distribution encompasses the Peloponnesos peninsula, the Cylade islands and a couple of locations north of the Corinthian Gulf. The archaeological site of Delphi harbours the rare subspecies Cordulegaster helladica kastalia, named after the Kastalian spring on this location and differentiated from the other subspecies by a larger, rectangular yellow spot between the thoracic stripes.