Nektaria Karantzi (born August 5, 1982) is a Byzantine and traditional singer from Greece.
Her voice has been identified mainly with the Byzantine sacred art and has been regarded as one of the most important voices in Byzantine Chant. She is the unique Greek performer of Byzantine music with discography in Byzantine music since she was fourteen and with active work of chanting as a chorister in church since she was nine. Her performances in concert halls in Greece and abroad are purely devoted to Byzantine Chant and has been internationally acclaimed as the most ideal performer of Byzantine Melos (chanting) and of the Primeval Tradition.