Lago di Chiusi

Lago di Chiusi
Lago di Chiusi Location within Tuscany
Location	Province of Siena, Tuscany
Coordinates	43°3′22.11″N 11°57′55.79″E
Primary inflows	Tresa
Primary outflows	Canale Maestro della Chiana
Basin countries	Italy
Surface area	3.87 km2 (1.49 sq mi)
Surface elevation	251 m (823 ft)

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.