Argavieso is a municipality in the province of Huesca, in the Aragon region of northeastern Spain. It is a small, rural settlement typical of the scattered villages found across this part of Aragon, within the comarca of Somontano de Barbastro.
The municipality is sparsely populated. As of 2010, it had a population of 119 inhabitants, reflecting the low population density common to many villages in the Huesca province.