San Cristóbal de Entreviñas is a municipality in the province of Zamora, in the autonomous community of Castile and León, Spain. It is located in the northwestern part of the country, within the broader Duero basin region that characterizes much of Zamora province.
The municipality had a population of 1,645 inhabitants according to the 2004 census conducted by the Instituto Nacional de Estadística (INE). Like many rural municipalities in Castile and León, it is a small, sparsely populated community whose administrative functions are handled at the municipal level.
San Cristóbal de Entreviñas is one of numerous small municipalities that make up the province of Zamora, a largely agricultural area known for its cereal cultivation and its position within the autonomous community of Castile and León. The town's name, which includes "Entreviñas" (literally "between vineyards"), reflects the wine-growing tradition common to parts of the region.