It is a city in the province of Zaragoza, Autonomous Community of Aragon, in Spain, the capital of the region and the judicial district that bears his name. It has 20,191 inhabitants according to. The Jalón river passes through it. Account with the Academy of Logistics of the Spanish Army of Earth, besides a center National University of Education to Distance (UNED).It holds the title of "very noble, loyal, always august and very faithful city of Calatayud."