Caspe is a municipality in the province of Zaragoza, part of the autonomous community of Aragon, in Spain, seat of the comarca of Bajo Aragón-Caspe. As of 2018 it had a population of 9,525 inhabitants and its municipality, of 503.33 km2, is the fourth largest in Aragon. Caspe obtained the title of city in the 19th century, as a result of the damage suffered in the Carlist Wars, by concession of Queen Isabella II.