Megas Alexandros (, Alexander the Great) is a former municipality in the Pella regional unit, Greece. Since the 2011 local government reform it is part of the municipality Pella, of which it is a municipal unit. It is named after Alexander the Great. The municipal unit has an area of 88.925 km<sup>2</sup>. Population 6,033 (2021). The seat of the municipality was in Galatades.