Blesa is a municipality in the province of Teruel, in the autonomous community of Aragon, Spain. It is a small, sparsely populated rural settlement located within the Teruel comarca of the same province, in the eastern part of the country.
The municipality is notable for its very small population. According to the 2004 census carried out by the Instituto Nacional de Estadística (INE), Blesa had 142 inhabitants. This figure reflects the broader pattern of depopulation seen across many of Aragon's inland villages.
As a municipality, Blesa is the basic unit of local administration in Spain, encompassing the settlement itself and its surrounding territory. Its location in Teruel places it within one of Spain's least densely populated provinces.