Mirabueno 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 sparsely populated interior of the Iberian Peninsula.
According to the 2004 census conducted by Spain's Instituto Nacional de Estadística (INE), Mirabueno had a population of 111 inhabitants. That figure reflects the municipality's character as a very small village, typical of the depopulated countryside found across parts of Guadalajara province.
As a municipality, Mirabueno holds the administrative status of a local governing unit within the Spanish system, encompassing the village itself and its surrounding municipal territory. Its location in Castile-La Mancha places it within one of Spain's largest autonomous communities, though the province of Guadalajara in which it sits lies toward the northern edge of that region.