The Ebro (Spanish: [ˈeβɾo]) or Ebre (Catalan: [ˈeβɾə, ˈeβɾe]) is one of the most important rivers in the Iberian Peninsula. It is the biggest river by discharge volume in Spain.

The Ebro flows through the following cities:

Its source is in Fontibre (Cantabria), from the Latin words Fontes Iberis, source of the Ebro. The upper Ebro rushes through rocky gorges in Burgos Province. Flowing roughly eastwards it begins forming a wider river valley when it reaches Navarre and La Rioja thanks to many tributaries flowing down from the Iberian System on one side, and the Navarre mountains and the western Pyrenees, on the other.

The valley expands and the Ebro's flow then becomes slower as its water volume increases flowing across Aragon. There, massive tributaries flowing from the Central Pyrenees and the Iberian System discharge large amounts of water, especially in spring during the thawing season of the mountain snow. As it flows through Zaragoza the Ebro, emblematic river of Aragon, is already a sizeable river. The Basilica of Our Lady of the Pillar stands next to the Ebro.