Lake Chiusi
General data
- Name: Lake Chiusi
- Water system: Arno
- Water type: Natural lake
- Progression: Canale Maestro della Chiana -> Arno -> Ligurian Sea -> Mediterranean Sea -> Atlantic Ocean -> Planet Earth
- Climates: Subtropical, Temperate
- Continents: Europe
- Countries: Italy
Lago di Chiusi is a lake in the Province of Siena, Tuscany, Italy. At an elevation of 251 m, its surface area is 3.87 km². Like other lakes in Etruria, such as Lake Bolsena and Lake Vico, it was formed from a volcanic crater.