Asín is a municipality in the province of Zaragoza, in the autonomous community of Aragon, Spain. It lies within the Cinco Villas comarca, a historical district in the northwest of the province, a few kilometers west of the municipality of Orés.
The municipality is small and sparsely populated. According to the 2004 census carried out by the Instituto Nacional de Estadística (INE), Asín had a population of 106 inhabitants.