| Lac du Monte Tignoso | |
| Location: | Corse-du-Sud, Corsica |
| Coords: | 41.5831°N 9.0928°W |
| Type: | Lake |
| Basin Countries: | France |
| Pushpin Map: | Corsica#France |
| Pushpin Label Position: | left |
Lac du Monte Tignoso (Corsican: Lavu di u Monti Tignosu) 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.