Xeniades (Greek: Ξενιάδης) was a skeptical philosopher from Corinth, probably a follower of the pre-Socratic Xenophanes. There may have been two such persons, as he is referenced by Democritus c. 400 BC, though was also supposedly the purchaser of Diogenes the Cynic c. 350 BC, when he was captured by pirates and sold as a slave. Xeniades was supposed to have been the man who persuaded Monimus to become a follower of Diogenes, and was the source of his skeptical doctrines.

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