There are thirteen other islands in the commune: Huar, Puluqui, Chidhuapi, Tabón, Mayelhue, Lín, Quenu, Quihua, Huapi Abtao, Chaullín, Caicué o lagartija, Tautil and Queullín.

According to the 2002 census of the National Statistics Institute, Calbuco spans an area of 590.8 km2 (228 sq mi) and has 31,070 inhabitants (15,906 men and 15,164 women).

Alfaro, Quenu, Puluqui, Challahue, Machildad, Chucahua, Quetrolauquén, Aguantao, Huayún and Río Tambor are more sparsely populated, further away from the towns of Calbuco and San Rafael.

[5] As a commune, Calbuco is a third-level administrative division of Chile administered by a municipal council, headed by an alcalde who is directly elected every four years.

The commune is represented in the Senate by Camilo Escalona Medina (PS) and Carlos Kuschel Silva (RN) as part of the 17th senatorial constituency (Los Lagos Region).