Hrings saga ok Tryggva is a medieval Icelandic saga about Hringr, the son of King Dagr. It is one of the romance sagas which were inspired by Continental romances. It survives only fragmentarily, though there are rímur which preserve the full story. Finnur Jónsson links this saga to Hálfdanar saga Eysteinssonar. However, there is evidence to suggest otherwise as Schröder argues the opposite and suggests that they are very different in nature. He calls this saga 'a purely literary romance novel', contrasting with Hálfdanar saga because of the latter's old fairy-tale tone.