Aristodemus () of Elis was an ancient Greek writer who was referred to by Harpocration as an authority respecting the number of the Hellanodikai.Harpocration, Lexicon of the Ten Orators s. v. Ἑλλανοδίκαι He is probably the same writer as the one mentioned by TertullianTertullian, de An. 46 and Eusebius.Eusebius Chron. i. p. 37; comp. Syncellus, p. 370, ed. Dindorf.
An "Aristodemus" is mentioned by Athenaeus as the author of a commentary on Pindar, and is often referred to in the Scholia on Pindar, but whether this Aristodemus is the one from Elis or Aristodemus of Nysa or another Aristodemus entirely is unknown.Athenaeus, Deipnosophistae xi. p. 495
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