Bierge is a municipality located in the province of Huesca, Aragon, Spain. According to the 2010 census, the municipality has a population of 258 inhabitants.GeographyBierge is at 600 meters on the sea, and it has the following villages: Las Almunias de Rodellar, Letosa, Morrano, Nasarre, Otín, Pedruel, Rodellar, San Hipólito, San Román, San Saturnino y Yaso.