Tortosa is the capital of the comarca of Baix Ebre, in Catalonia, Spain.

Catalonia is an autonomous community of Spain, designated as a nationality by its Statute of Autonomy. Most of its territory lies on the northeast of the Iberian Peninsula, to the south of the Pyrenees mountain range. Catalonia is administratively divided into four provinces or eight regions, which are in turn divided into 42 comarques. The capital and largest city, Barcelona, is the second-most populated municipality in Spain and the fifth-most populous urban area in the European Union.