The Tono River (Portuguese: Ribeira de Tono or Rio Tono, Tetum: Mota Tono) is the principal river of Oecusse, an exclave of East Timor. The river and its major tributaries flow generally north, through the centre of the exclave, into the Savu Sea, reaching the sea near Lifau. Its alluvial flood plain in Pante Macassar administrative post is the main rice-producing place in Oecusse.