Sallent de Gállego is a municipality in the province of Huesca, in the autonomous community of Aragon, Spain. It is located in the Pyrenees, in the northern part of the province near the border with France.
The town sits in the Tena Valley, at the confluence of the Gállego River and the Aguas Limpias, a tributary that gives the municipality part of its name. Its position in the Pyrenees places it within a mountainous area known for its reservoirs and ski terrain.