Heliodorus /ˌhiːliəˈdɔːrəs/ is a Greek name meaning "Gift of the Sun". Several persons named Heliodorus are known to us from ancient times, the best known of which are:

• Heliodorus (minister) a minister of Seleucus IV Philopator c. 175 BC
• Heliodorus of Athens ancient author who wrote fifteen books on the Acropolis of Athens, possibly about 150 BC
• Heliodorus (ambassador), a Greek ambassador who erected famous votive Heliodorus pillar around 110 BC near Vidisha, Madhya Pradesh, India
• Heliodorus (metrist) a metrist in the 1st century who did work on the comedies of Aristophanes
• Heliodorus (surgeon) a surgeon in the 1st century, probably from Egypt, and mentioned in the Satires of Juvenal
• Gaius Avidius Heliodorus, 2nd century secretarius ab epistolis and Prefect of Egypt
• Heliodorus of Larissa, c. 3rd century, author of an extant treatise on optics
• Heliodorus of Emesa, 3rd-century Phoenician author of the novel Aethiopica
• Heliodorus (sophist) a 3rd century sophist from Arabia Petraea
• Heliodorus of Bet Zabdai (died 344), Syrian bishop and martyr
• Heliodorus of Altino (died 390), 4th-century Christian saint
• Heliodorus of Alexandria 5th-century Neoplatonist philosopher, and brother of Ammonius Hermiae
• Heliodorus (6th-century philosopher), author of a work entitled Commentary
• Heliodorus of Catania, 8th-century necromancer and witchdoctor from Catania