Cleomenes may refer to:
* one of several kings of Sparta:
** Cleomenes I (c. 520 – c. 490 BC)
** Cleomenes II (370–309 BC)
** Cleomenes III (236–219 BC)
* Cleomenes of Naucratis (died 322 BC), Greek administrator
* Cleomenes the Cynic (c. 300 BC), Cynic philosopher
* Cleomenes (seer) (), seer in the service of Alexander the Great
* ''Cleomenes, the Spartan Hero'' (1692), a play written by John Dryden on the life of Cleomenes III
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