Fuentesaúco is a municipality in Spain, located in the province of Zamora within the autonomous community of Castile and León. It lies in the northern part of the country, in a region characterised by the flat, agricultural plains of the Castilian plateau.
Like many settlements in this part of Zamora, Fuentesaúco is a small, rural municipality whose surroundings are dominated by farmland. The province of Zamora as a whole is known for its cereal cultivation and its historic ties to the wider Castile and León region, and Fuentesaúco forms part of that local administrative and geographic landscape.
As a municipality, Fuentesaúco serves as a local administrative unit covering the town itself and its associated territory. It is one of numerous such municipalities that make up the province of Zamora, a province that borders Portugal to the west and sits within Spain's largest autonomous community by area.