Archidamus IV is a king of Sparta from 305 BCE to c. 275 BCE.
He is the 23rd of the Eurypontids, the son of Eudamidas I and Arachidamia and the brother of Agesistrata, the nephew of Agis III and the grandson of Archidamus III.
In 296 BCE, he is defeated by Demetrius Poliorcetes.