Auñón is a municipality in the province of Guadalajara, in the autonomous community of Castile-La Mancha, Spain. It is located in the central part of the country, within the Guadalajara province that forms part of the wider Castile-La Mancha region.
The municipality is small in population. According to the 2004 census carried out by Spain's National Statistics Institute (INE), Auñón had a population of 254 inhabitants. This figure reflects the modest size typical of many rural municipalities in the province of Guadalajara.
As a municipality, Auñón constitutes a basic unit of local administration in Spain, encompassing the settlement and its surrounding area within the province of Guadalajara.