Falaisia (Greek: Φαλαισία, before 1918: Μπούρα - Boura) is a village and a former municipality in southwestern Arcadia, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Megalopoli, of which it is a municipal unit. The municipal unit has an area of 274.926 km2. The seat of the municipality was in Leontari, 5 km northwest of the village Falaisia. The municipal unit Falaisia is located in the northern foothills of the Taygetus mountains, south of Megalopoli and north of Kalamata. It borders on Laconia to the southeast, and Messenia to the southwest.