Gramos (, ) is a remote mountain village and a former community in Kastoria regional unit, West Macedonia, Greece. Since the 2011 local government reform it is part of the municipality Nestorio, of which it is a municipal unit. The municipal unit has an area of 59.422 km2. Population 18 (2011). The village is a traditional Aromanian (Vlach) settlement, named after the nearby Gramos mountains to its south. It lies very close to the Albanian border. Throughout the centuries, the locals had suffered from Albanian Muslim raiders. The source of the river Aliakmonas is near Gramos. It had the smallest population of any municipality or community in Greece at 28 inhabitants in the 2001 Greek census. It was also the least densely populated community or municipality in Greece, at 0.47 inhabitants/km2. A small road connects Gramos with Nestorio, 20 km to its east.