Demetrius (Ancient Greek: Δημήτριος) (died 330 BC) was one of Alexander's somatophylakes. He was suspected of being engaged in the conspiracy of Philotas, and was executed. Ptolemy (son of Lagus) replaced him as Somatophylax.
- Arrian, Anabasis 3.27.5
- Quintus Curtius Rufus 6.7.15 and 6.11.35-38
- Who's Who in the Age of Alexander the Great by Waldemar Heckel ISBN 978-1-4051-1210-9 (extract online)