The Paraguay River (Ysyry Paraguái in Guarani, Rio Paraguai in Portuguese, Río Paraguay in Spanish) is a major river in south-central South America, running through Brazil and Paraguay and forming parts of the Paraguay-Argentina, Brazil-Bolivia, and Brazil-Paraguay borders. It flows about 2,695 kilometres (1,675 mi) from its headwaters in the Brazilian state of Mato Grosso to its confluence with the Paraná River north of Corrientes and Resistencia.
