Miralrío 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, situated in the region historically known as the Alcarria.
The municipality is notable for its very small population. According to the 2004 census conducted by Spain's National Statistics Institute (INE), Miralrío had just 76 inhabitants, making it one of the many sparsely populated villages characteristic of the Guadalajara countryside.