Koufonisia (Greek: Κουφονήσια) is a former community in the Cyclades, Greece. Since the 2011 local government reform it is part of the municipality Naxos and Lesser Cyclades, of which it is a municipal unit. The municipal unit has an area of 26.025 km2.

Koufonisia includes three main islands:

• Epano, Pano or Ano Koufonisi (for Upper) often merely called Koufonisi (in Greek: επάνω κουφονήσι)
• Kato Koufonisi (for Lower) (in Greek: Κάτω Κουφονήσι) and
• Keros or Karos (in Greek: Κέρος)

Geographically, they are located on the south-southeast side of Naxos and on the west-northwest of Amorgos and belong to the archipelago of the Lesser East Cyclades. Uninhabited Keros is a protected archaeological site from which a large number of ancient Cycladic art pieces have been excavated in the 20th century.

Source: Wikipedia