Gúdar is a municipality in the province of Teruel, in the autonomous community of Aragon, Spain. It is a small, sparsely populated rural settlement in the mountainous terrain of the Teruel region.
According to the 2004 census recorded by the Instituto Nacional de Estadística (INE), the municipality had a population of 80 inhabitants. This low figure reflects the pattern of depopulation common to many small municipalities in inland Aragon.
Gúdar is the namesake of the surrounding Sierra de Gúdar, the mountain range in which it lies, though the municipality itself remains a minor administrative entity defined chiefly by its small resident population and its location within the province of Teruel.