Atienza is a municipality in Spain, located in the province of Guadalajara within the autonomous community of Castile-La Mancha. It lies in the central part of the country, in a region historically associated with the broader Castilian interior.
According to the 2023 census conducted by Spain's National Statistics Institute (INE), the municipality had a population of 434 inhabitants. This small population figure reflects the modest scale of the town and its surrounding municipal territory.
Atienza is one of the many small municipalities that make up the sparsely populated rural areas of the province of Guadalajara. Its administrative status as a municipality places it within the local governance structure of the province and the wider Castile-La Mancha region.