Budia 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 interior of the Iberian Peninsula.
According to the 2004 census conducted by Spain's Instituto Nacional de Estadística (INE), Budia had a population of 214 inhabitants. This figure reflects the municipality's character as a sparsely populated village typical of the Guadalajara countryside.