Itaipu Binacional is a company that runs the largest operational hydroelectric power plant in the world. It is a binational undertaking run by Brazil and Paraguay at the Paraná River on the border section between the two countries, 15 km north of the Friendship Bridge. The project ranges from Foz do Iguaçu, in Brazil, and Ciudad del Este in Paraguay, in the south to Guaíra and Salto del Guaíra in the north.

Itaipu is one of the Seven Wonders of the Modern World.