Graneros is a Chilean commune and city in Cachapoal Province, O'Higgins Region.

According to the 2002 census of the National Statistics Institute, Graneros spans an area of 112.7 km2 (44 sq mi) and has 25,961 inhabitants (12,992 men and 12,969 women).

[2] As a commune, Graneros 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 council has the following members:[1] Within the electoral divisions of Chile, Graneros is represented in the Chamber of Deputies by Eugenio Bauer (UDI) and Ricardo Rincón (PDC) as part of the 33rd electoral district, together with Mostazal, Codegua, Machalí, Requínoa, Rengo, Olivar, Doñihue, Coinco, Coltauco, Quinta de Tilcoco and Malloa.

The commune is represented in the Senate by Andrés Chadwick Piñera (UDI) and Juan Pablo Letelier Morel (PS) as part of the 9th senatorial constituency (O'Higgins Region).