Pirihueico Lake (Spanish: Lago Pirihueico, Spanish pronunciation: [piɾiˈwejko] Pronounced: /ˌpɪəriˈweɪkoʊ/ PEER-ee-WAY-koh) is one of Seven Lakes in Panguipulli Commune, southern Chile.

The lake is of glacial origin and it is enclosed mountains of the Andes.

Pirihueico Lake is used as a waterway due to its elonged shape.

It is used mostly by vehicles traveling to or from Argentina by the nearby Huahum Pass.

This Los Ríos Region location article is a stub.