Lac du Monte Tignoso () is a small lake in the Monte Renoso massif in the Corse-du-Sud department of France.
The lake is in the Monte Incudine massif at an elevation of . It is in the commune of Figari, on the southeast flank of the Montagne de Cagna above the source of the Ruisseau de Vivaggio. It is a seasonal lake that is dry for much of the year.