The commune covers an area of . The eastern (and smaller) part of its territory lies within the fertile, central plain or "depresión intermedia", (Chilean Central Valley) but the extense western part is hilly and somewhat drier, a typical "Cordillera de la Costa" terrain, which requires supplemental irrigation to support its varied cultivations.
The commune spans an area of . The eastern (and smaller) part of its territory is located within the fertile, central plain or "depresión intermedia" (Chilean Central Valley), but the extensive western part consists of hills and somewhat drier terrain, typical of the "Cordillera de la Costa" region, which necessitates supplemental irrigation for diverse cultivation.