Salas Altas is a municipality in the province of Huesca, in the autonomous community of Aragon, Spain. It is located in the Somontano de Barbastro comarca, a district in the foothills of the Pyrenees in northern Aragon.
According to the 2018 census conducted by the Instituto Nacional de Estadística (INE), the municipality had a population of 308 inhabitants. As with many small municipalities in rural Aragon, the population is spread across a compact settlement within a predominantly agricultural landscape.