It is the largest lake of Los Ríos Region and the fourth largest in Chile. Administratively Ranco Lake is split into three communes; La Unión, Futrono and Lago Ranco.
Ranco Lake is a significant geographical feature in the Los Ríos Region of Chile, being the largest lake and the fourth-largest in the country. Administratively, it is split into three municipalities: La Unión, Futrono, and Lago Ranco.