|Town and Commune|
|• Alcalde||Ramón Vilches Álvarez (Ind.)|
|• Total||499.7 km2 (192.9 sq mi)|
|Elevation||306 m (1,004 ft)|
|Population (2012 Census)|
|• Density||17/km2 (44/sq mi)|
|Time zone||CLT  (UTC-4)|
|• Summer (DST)||CLST  (UTC-3)|
|Area code(s)||56 + 45|
According to the 2002 census of the National Statistics Institute, Ercilla spans an area of 499.7 km2 (193 sq mi) and has 9,041 inhabitants (4,633 men and 4,408 women). Of these, 3,238 (35.8%) lived in urban areas and 5,803 (64.2%) in rural areas. Between the 1992 and 2002 censuses, the population grew by 2.3% (199 persons).
As a commune, Ercilla 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 2008-2012 alcalde is Ramón Vilches Álvarez (Ind.).
Within the electoral divisions of Chile, Ercilla is represented in the Chamber of Deputies by Gonzalo Arenas (UDI) and Mario Venegas (PDC) as part of the 48th electoral district, (together with Angol, Renaico, Collipulli, Los Sauces, Purén, Lumaco and Traiguén). The commune is represented in the Senate by Alberto Espina Otero (RN) and Jaime Quintana Leal (PPD) as part of the 14th senatorial constituency (Araucanía-North).
- "Asociación Chilena de Municipalidades" (in Spanish).
- "National Statistics Institute" (in Spanish). Retrieved 8 September 2010.
- "Chile Time". WorldTimeZones.org. Archived from the original on 2007-09-11. Retrieved 2010-07-29.
- "Chile Summer Time". WorldTimeZones.org. Archived from the original on 2007-09-11. Retrieved 2010-07-29.