A number of notables in classical antiquity are named Demetrius:
- Demetrius, a writer of Old Comedy ca. 400 BC, mentioned by Diogenes Laertius
- Demetrius of Alopece, sculptor 5th/4th century BC
- Demetrius Phalereus, philosopher and statesman of 4th century BC
- Demetrius I of Macedon Poliorcetes (336-283 BC)
- Demetrius the Fair , son of Poliorcetes
- Demetrius II of Macedon (276-229 BC)
- Demetrius of Pharos , ruler in Illyria 3rd century BC
- Demetrius I of Bactria, Indo-Greek king ca 180-165 BC
- Demetrius I of Syria, Seleucid king
- Demetrius II of Syria, his son
- Demetrius of Scepsis , grammarian and archaeologist 3rd century BC
- Demetrius Ixion , grammarian 2nd century BC
- Demetrius Lacon , Epicurean philosopher 2nd century BC
- Demetrius, composed a guide to letter-writing with 21 types and examples of each type
- Demetrius of Magnesia , writer
- Demetrius , rhetorical stylist
- Demetrius III of Syria, Seleucid king 1st century BC
- Demetrius of Tarsus , grammarian
- Demetrius the Cynic, philosopher 1st century
- Demetrius of Troezen , 1st century writer on literary history, mentioned by Athenaeus and Diogenes Laertius
Others include:
