Alexander I of Epirus
| Alexander I | |
|---|---|
| King of Epirus | |
| Coin of Alexander I. Obverse: head of Zeus. Reverse: thunderbolt, caption ΑΛΕΞΑΝΔΡΟY ΤΟΥ ΝΕΟΠΤΟΛΕΜΟΥ. | |
| Reign | 343/2 - 331 BC | 
| Predecessor | Arybbas of Epirus | 
| Successor | Aeacides of Epirus | 
| Born | c. 370 BC | 
| Died | 331 BC | 
| Spouse | Cleopatra of Macedon | 
| Issue | 
 | 
| House | Aeacidae | 
| Father | Neoptolemus I of Epirus | 
| Religion | Ancient Greek religion | 
Alexander I of Epirus (Ancient Greek: Ἀλέξανδρος Α'; c. 370 BC – 331 BC), also known as Alexander Molossus (Ἀλέξανδρος ὁ Μολοσσός), was a king of Epirus (343/2–331 BC) of the Aeacid dynasty. As the son of Neoptolemus I and brother of Olympias, Alexander I was an uncle, and a brother-in-law, of Alexander the Great. He was also an uncle to Pyrrhus of Epirus.