Eudamidas III (Greek: Εὐδαμίδας; reigned from 241 to 228 BC), son of Agis IV and Agiatis, daughter of Gylippus, was king of Sparta and a member of the Eurypontid dynasty. When his father was murdered he had just been born. Due to his minor age he never reigned and was succeeded by his uncle Archidamus V.