Capdesaso is a municipality in the province of Huesca, in the autonomous community of Aragon, Spain. It is located in the comarca of Monegros, within the Ebro Depression of northeastern Spain.
The municipality is small and sparsely populated, with a population of 160 inhabitants recorded in the 2004 census (INE). Its economy has traditionally been based on agriculture, as is typical of the surrounding Monegros district.
Capdesaso lies near the Monegros desert, a semi-arid steppe landscape known for its dry climate and distinctive terrain. The area is accessible via local roads connecting it to nearby towns in the province of Huesca.