Castejón del Puente is a municipality in the province of Huesca, in the autonomous community of Aragon, Spain. It is located in the northeastern part of the country, within the comarca of Somontano de Barbastro.
According to the 2004 census carried out by the Instituto Nacional de Estadística (INE), the municipality had a population of 435 inhabitants. The town is situated near the Cinca river, and its name reflects the presence of a bridge (puente) in the area.
Like many small municipalities in rural Aragon, Castejón del Puente is characterized by a low population density and a setting within the region's agricultural landscape. The town lies close to the city of Barbastro, the administrative center of the comarca.