Calbuco (/kɑːlˈbuːkoʊ/ kahl-BOO-koh; Spanish: Volcán Calbuco, pronounced [bolˈkaŋ kalˈβuko]) is a stratovolcano in southern Chile, located southeast of Llanquihue Lake and northwest of Chapo Lake, in the Los Lagos Region, and close to the cities of Puerto Varas and Puerto Montt.

Its complex evolution included the collapse of an intermediate edifice during the late Pleistocene that produced a debris avalanche that reached Llanquihue Lake.

[9] The 1893–95 Calbuco eruption was one of the largest ever to take place in southern Chile, with debris ejected to distances of eight kilometres, accompanied by voluminous hot lahars.

[citation needed] The 1893 eruption disrupted the daily life of German settlers in eastern Llanquihue Lake.

[citation needed] The major eruption of 1961 sent ash columns 12–15 km high, produced plumes that dispersed mainly to the south east and emitted two lava flows.