Alcimachus or Alkimachos (Greek: Ἀλκίμαχος) is an ancient Greek name and may refer to:

  • Alcimachus (painter), a painter mentioned by Pliny. He painted a picture of Dioxippus, a victor in the pancratium at Olympia.
  • Alcimachus, father of Agathocles of Pella
  • Alcimachus, father of Euphorbus, a traitor who betrayed Eretria to Persians
  • Alcimachus of Apollonia, first son of the Thessalian Agathocles and the eldest brother of Lysimachus, who was a general and diplomat of Alexander the Great
  • Alcimachus, son to the above named and nephew of Lysimachus
  • Alkimachos of Pydna, Macedonian-Epirote buried in Pydna
  • Alcimachus, an Athenian general from the deme Anagyrous
  • Alcimachus, a Macedonian