Antillón is a municipality in the province of Huesca, in the autonomous community of Aragon, Spain. It is a small, rural settlement typical of the sparsely populated countryside of northern Aragon.
According to the Instituto Nacional de Estadística (INE), the municipality had a population of 150 inhabitants as of 2010. This figure reflects the modest size of the community and its place among the many small municipalities that make up the province of Huesca.