The Río de la Plata (River Plate) is a river estuary in Argentina and Uruguay. Río de la Plata may also refer to: United Provinces of the Río de la Plata, a short lived nation in South America between 1810-1831 Río de la Plata Basin, the hydrographical area that covers parts of Argentina, Brazil, Bolivia, Paraguay and Uruguay Río de la Plata Craton, one of the five cratons (ancient nuclei) of the South American continent Viceroyalty of the Río de la Plata, an administrative district within the Spanish empire Governorate of the Río de la Plata, an administrative district preceding the viceroyalty Río de la Plata Bank, a building in Madrid by Antonio Palacios Río de la Plata (Puerto Rico), a river in Puerto Rico La Plata River (San Juan River), in the United States See also River Plate (disambiguation) Platte River