In Greek mythology, Mopsus, was the Lapith son of Ampyx and a nymph, born at Titaressa in Thessaly, was also a seer and augur. In Thessaly the place name Mopsion recalled his own. The earliest evidence of him is inscribed on the strap of a soldier's shield, found at Olympia and dated c.600–575 BC.
- Position held
- mythological king of Thrace