Demetrius I (; Greek: Δημήτριος; 337–283 BC), called Poliorcetes (; Greek: Πολιορκητής, "The Besieger"), son of Antigonus I Monophthalmus and Stratonice, was a Macedonian nobleman, military leader, and finally king of Macedon (294–288 BC). He belonged to the Antigonid dynasty and was its first member to rule Macedonia.