In Greek mythology, Olenus (; Ancient Greek: Ὄλενος Olenos) was the name of several individuals:
- Olenus, son of Hephaestus and father of Helike and Aex, two nurses of infant Zeus. A city in Aulis was named for him.
- Olenus, son of Zeus and Anaxithea (or Hippodamia), daughter of Danaus. He was the eponym of the city Olenus in Achaea.
- Olenus, father of Tectaphus, a Lapith.
- Olenus, a man who lived on Mount Ida. His wife Lethaea claimed she was more beautiful than any goddess. They were both turned to stone; although Olenus could have avoided this fate, he chose to be with his wife.
- Olenus, a Lelegian, father of Phoceus. His son was killed by the Argonauts.
- Gaius Julius Hyginus, Astronomica 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.
- Gaius Valerius Flaccus, Argonautica translated by Mozley, J H. Loeb Classical Library Volume 286. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1928. Online version at theio.com.
- Gaius Valerius Flaccus, Argonauticon. Otto Kramer. Leipzig. Teubner. 1913. Latin text available at the Perseus Digital Library.
- Pseudo-Clement, Recognitions from Ante-Nicene Library Volume 8, translated by Smith, Rev. Thomas. T. & T. Clark, Edinburgh. 1867. Online version at theio.com
- 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.
- Stephanus of Byzantium, Stephani Byzantii Ethnicorum quae supersunt, edited by August Meineike (1790-1870), published 1849. A few entries from this important ancient handbook of place names have been translated by Brady Kiesling. Online version at the Topos Text Project.