In Greek mythology, Epopeus (; Ancient Greek: Ἐπωπεύς means 'all-seer', derived from epopao "to look out", "observe", from epi "over" and ops "eye") was the name of the following figures:
- Epopeus, was king of Sicyon.
- Epopeus, king of Lesbos and both father and rapist of Nyctimene.
- Epopeus, one of the sailors who tried to delude Dionysus, but were turned into dolphins.
- Epopeus, a man from Lemnos, killed by the Lemnian women when these murdered all the men in the island. Epopeus was killed by his own mother.
- Gaius Julius Hyginus, Fabulae from The Myths of Hyginus translated and edited by Mary Grant. University of Kansas Publications in Humanistic Studies. Online version at the Topos Text Project.
- Pseudo-Apollodorus, The Library with an English Translation by Sir James George Frazer, F.B.A., F.R.S. in 2 Volumes, Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1921. Online version at the Perseus Digital Library. Greek text available from the same website.
- Publius Ovidius Naso, Metamorphoses translated by Brookes More (1859-1942). Boston, Cornhill Publishing Co. 1922. Online version at the Perseus Digital Library.
- Publius Ovidius Naso, Metamorphoses. Hugo Magnus. Gotha (Germany). Friedr. Andr. Perthes. 1892. Latin text available at the Perseus Digital Library.
- Publius Papinius Statius, The Thebaid translated by John Henry Mozley. Loeb Classical Library Volumes. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1928. Online version at the Topos Text Project.
- Publius Papinius Statius, The Thebaid. Vol I-II. John Henry Mozley. London: William Heinemann; New York: G.P. Putnam's Sons. 1928. Latin text available at the Perseus Digital Library.