It is bounded on the north by the Laja River, on the west by the Biobío river, and the south and the east by the commune of Los Ángeles.
Demographics
According to the 2002 census of the National Statistics Institute, Laja spans an area of 339.8 km2 (131 sq mi) and has 22,404 inhabitants (11,113 men and 11,291 women). Of these, 16,288 (72.7%) lived in urban areas and 6,116 (27.3%) in rural areas. The population fell by 8% (1946 persons) between the 1992 and 2002 censuses.[3]
Within the commune's territory are: Laja, its capital city; the villages of Las Ciénagas, Villa Laja and Las Playas; and the small villages of Puente Perales, Cantera, Violeta Parra, Cachapoal, La Colonia, Las Ciénagas, Diuquín, Picul, Santiago Chico, Quilales, Chillancito, Las Viñas, Las Lomas, Santa Elena, La Aguada and Arenas Muertas.[6]