Bercero is a municipality in Spain, located in the province of Valladolid within the autonomous community of Castile and León. It lies in the northern part of the country's central plateau.
According to the 2004 census conducted by the Instituto Nacional de Estadística (INE), the municipality had a population of 248 inhabitants. This small population figure reflects the modest size typical of many rural municipalities in the region.
As a municipality, Bercero holds the administrative status granted to local entities in Spain, with its own local government. It is one of numerous small municipalities that make up the province of Valladolid.