Krystallopigi (Greek: Κρυσταλλοπηγή) or Kroustallopigi (Κρουσταλλοπηγή), before 1926: Smardesi (Σμαρδέσι) is a former community in Florina regional unit, West Macedonia, Greece. Since the 2011 local government reform it is part of the municipality Prespes, of which it is a municipal unit. Krystallopigi is located close to the Greek–Albanian border and is 50 km (31 mi) from Florina.
The municipal unit has an area of 101.984 km. The population is 145 (2021). The main village is also called Krystallopigi. After the Greek Civil War, the village was resettled with Aromanians from Epirus. Today they still form the majority of the town's population. Nearby is located the depopulated village Vambel.