In Greek mythology, Ornea or Ornia (Ancient Greek: Ὀρνία) was the possible eponymous nymph of Orneae, a town in Argolis. Otherwise, it is attributed to Orneus, the Athenian son of King Erechtheus.^[1]

Ornia was one of the naiad daughters of the river-god Asopus and Metope, the river-nymph daughter of the river Ladon. She was the sister of Pelasgus, Ismenus, Corcyra, Salamis, Aegina, Pirene, Cleone, Thebe, Tanagra, Thespeia, Asopis, Sinope, Chalcis^[2] and Harpina.^[3]

• Diodorus Siculus, The Library of History translated by Charles Henry Oldfather. Twelve volumes. Loeb Classical Library. Cambridge, Massachusetts: Harvard University Press; London: William Heinemann, Ltd. 1989. Vol. 3. Books 4.59–8. Online version at Bill Thayer's Web Site
• Diodorus Siculus, Bibliotheca Historica. Vol 1-2. Immanel Bekker. Ludwig Dindorf. Friedrich Vogel. in aedibus B. G. Teubneri. Leipzig. 1888–1890. Greek text available at the Perseus Digital Library.
• Lucius Mestrius Plutarchus, Lives with an English Translation by Bernadotte Perrin. Cambridge, MA. Harvard University Press. London. William Heinemann Ltd. 1914. 1. Online version at the Perseus Digital Library. Greek text available from the same website.
• Pausanias, Description of Greece with an English Translation by W.H.S. Jones, Litt.D., and H.A. Ormerod, M.A., in 4 Volumes. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1918. ISBN 0-674-99328-4. Online version at the Perseus Digital Library
• Pausanias, Graeciae Descriptio. 3 vols. Leipzig, Teubner. 1903. Greek 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.