Andragathus was a man in ancient Greece given command of the garrison at Amphipolis by Demetrius I of Macedon in 287 BCE to keep the threat of rival general Lysimachus in check while Demetrius went off to wage war against Pyrrhus of Epirus at Beroea. Andragathus surrendered the city to Lysimachus, perhaps after being offered a bribe.