The Matarranya (Spanish: Río Matarraña, Catalan: Riu Matarranya) is a river in the provinces of Teruel and Zaragoza, Aragon, Spain. It begins its course at 1,200 m northeast of the Tossal d'Encanader, Ports de Beseit. limestone massif near La Pobla de Benifassà.

The Matarranya flows roughly from south to north into the Ebro (Ebre), 4 km east of Faió (Fayón). This river gives its name to the Matarranya Catalan language-speaking comarca of Aragon.

• From the left:
  • Algars River
  • Ulldemó River
  • Barranc de Calapatar
• From the right:
  • De Pena River
  • Tastavins River

• Ports de Beseit
• Matarraña/Matarranya comarca

• Turismo de Aragon (in Spanish)
• Matarranya Tourism
• Interpreting avulsion process from ancient alluvial sequences: Guadalope-Matarranya system (northern Spain) and Wasatch Formation (western Colorado)
• Map of the river within the historical comarca
• Effect of floods of different magnitude on the macroinvertebrate communities of Matarranya stream (Ebro river basin, NE Spain)
• Microhabitat Use in a Mediterranean Riverine Fish Assemblage - Fishes of the Upper Matarranya

41°11′00.89″N 00°09′50.51″E / 41.1835806°N 0.1640306°E / 41.1835806; 0.1640306