Aísa is a town and municipality located in the province of Huesca, Aragon, Spain. According to the 2009 census, the municipality had a populati…Aísa is a town and municipality located in the province of Huesca, Aragon, Spain. According to the 2009 census, the municipality had a population of 394 residents. The municipality includes the towns of Candanchú, Esposa and Sinués.