Ruesca is a municipality in the province of Zaragoza, in the autonomous community of Aragon, Spain. It is located in the comarca of Comunidad de Calatayud, in the northeastern part of the Iberian Peninsula.
According to the 2004 census by Spain's Instituto Nacional de Estadística (INE), Ruesca had a population of 86 inhabitants. The municipality is one of many small, sparsely populated settlements that make up the rural interior of Zaragoza province.