Casaseca de las Chanas is a municipality in the province of Zamora, within the autonomous community of Castile and León, Spain. It is located in the northwestern part of the country, in a region characterised by a continental Mediterranean climate and a landscape of plains and rolling terrain typical of the Duero basin.
According to the 2009 census conducted by the Instituto Nacional de Estadística (INE), the municipality had a population of 420 inhabitants. Like many small municipalities in rural Castile and León, it is a sparsely populated settlement whose administrative functions are handled at the municipal level.
The town lies within the comarca of Tierra del Vino, a traditional wine-producing area of the province of Zamora, though the source material does not provide further details on its local economy, history, or landmarks.