Archidamus V was the 27th of the Kings of Sparta of the Eurypontid line, reigning 228-227 BC.
He was the son of Eudamidas II and through him the grandson of Archidamus IV, after whom he was named.
After his brother Agis IV was murdered in 241 BC, he fled to Messenia. In 228 (or 227) he was called back to Sparta by King Cleomenes III of the Agaid line, who had no counterpart on the throne by then. He was assassinated shortly afterwards. Polybius claims that he was killed by Cleomenes.