Atanzón is a municipality in the province of Guadalajara, within the autonomous community of Castile-La Mancha, Spain. It is a small rural settlement in the central part of the country, located in the region historically known as the Alcarria.
The municipality is sparsely populated. According to the 2004 census conducted by Spain's National Statistics Institute (INE), Atanzón had a population of 105 inhabitants. This figure reflects the pattern of low population density typical of many villages in the Guadalajara province.
As a municipality, Atanzón forms part of the local administrative structure of Castile-La Mancha, with its own municipal government. Its small size and inland location place it among the many minor municipalities that make up the province of Guadalajara.