Mequinenza or Mequinensa is a town and municipality of the province of Zaragoza, in the autonomous community of Aragon, Spain. It is located beside the river Segre, close to its confluence with the river Ebro between the Mequinenza Dam and Riba-roja reservoir.

Zaragoza, also called Saragossa in English, is a province of northern Spain, in the central part of the autonomous community of Aragon. Its capital is the city of Zaragoza, which is also the capital of the autonomous community. Other towns in the province include La Almunia de Doña Godina, Borja, Calatayud, Caspe, Ejea de los Caballeros, Tarazona, and Utebo.