The Cinca (Spanish: [ˈθiŋka]; Catalan: [ˈsiŋkə], locally: [ˈsiŋka]; Aragonese: A Cinca, IPA: [a ˈθiŋka]) is a river in Aragon, Spain. Its source is in the Circo de Pineta, in the Ordesa y Monte Perdido National Park, in the Aragonese Pyrenees. It is a tributary to the Segre River, with its confluence at La Granja d'Escarp, not far from the point where the Segre flows into the Ebro River.