List of rivers in South America:
| Name of the river
|
Length | Source | Mouth | Country |
| Amazon River | 6400 km | Montaro river | Atlantic Ocean | Peru, Colombia and Brazil |
| Parana River | 4880 km | Paranaiba and Grande conflunce | Rio de la Plata | Argentina, Brazil, Paraguay |
| Jurua River | 3100 km | Ucayali | Amazon river | Brazil, Peru |
| Purus River | 2960 km | Ucayali | Amazon River | Brazil, Peru |
| Sao Francisco River | 2830 km | Canastra Mountain | Atlantic Ocean | Brazil |
| Paraguay River | 2695 km | State of Mato Grosso | Parana River | Paraguay, Brazil, Argentina, Bolivia |
| Tocantins River | 2450 km | Serra Dourada | Marajo Bay Atlantic Ocean, | Brazil |
| Orinoco River | 2250 km | Parima Mountain | Atlantic Ocean | Colombia, Venezuela |
| Rio Negro River | 2250 km | Vaupes river | Amazon river | Colombia, Venezuela, Brazil |
| Japura River | 2036 km | Paramo de La Papas | Amazon River | Brazil, Colombia |
| MamoreRiver | 1930 km | Kordillere Von Cochabamba | MadeiraRiver | Bolivia, Brazil |
| AraguaiaRiver | 1910 km | Nascente do Rio Araguaia | TocantinsRiver | Brazil |
| Uruguay River | 1838 km | PelotasRiver and CanoasRiver | Rio De la Plata | Argentina, Brazil, Uruguay |
| Maranon River | 1737 km | Andes | UcayaliRiver and Amazon River | Peru |
| SolimoesRiver | 1700 km | MaranonRiver | Amazon River | |
| XinguRiver | 1640 km | Mato Grosso Plateau | Amazon River | Brazil |
| Putumayo River | 1610 km | Andean Natural Region | Amazon River | Brazil, Colombia, Peru and Ecuador |
| Magdalena River | 1528 km | Laguna Magdalena | Caribbean Sea and AtlanticSea | Colombia |
| Rio Guaviare River | 1497 km | Guayabero River and Rio Ariari | Orinoco | Colombia |
| Ucayali River | 1460 km | Apurimac | Amazon River | Peru |
| Madeira River | 1450 km | Mamore River and Rio Madre De Dios | Amazon River | Bolivia, Brazil |
| Parnaiba River | 1400 km | Chapada das mangabeiras | Atlantic Ocean | Brazil |
| Iguazu River | 1320 km | Serra Do Mar | Parana River | Brazil and Argentina |
| Rio Itenez O Guapore River | 1260 km | Parecis Plateau | Mamore River | Bolivia and Brazil |
| Pilcomayo River | 1100 km | Andes | Paraguay River | Argentina, Bolivia, Paraguay |
| Vaupes River
|
1050 km | Gauviare | Rio Negro | Brazil and Colombia |
| Rio Arauca River | 1050 km | Paramo del Almorzadero | Orinoco | Colombia and Venezuela |
| Rio Apure River | 1038 Km | VenezuelaColombia | Orinoco | Colombia, Venezuela |
| EssequiboRiver | 1014 km | Acarai Mountain | Atlantic Ocean | Guyana and Venezuela |
| Parnaiba River | 1000 km | Serra Da Mata Da Corda | Parana River, Rio Grande | Brazi |
| Cauca River | 965 km | Colombian Massif | MagdalenaRiver | Colombia |
| Rio Caroni River | 952 km | Rio Yuruari and CuquenanRiver | Orinoco | Venezuela |
| Tapajos River | 840 km | JuruenaRiver and Teles Pires | Amazon River | Brazil |
| Meta River | 804 km | Colombia | Orinoco | Colombia, Venezuela |
| Mantaro River | 739 km | Chinchayqucha | EneRiver | Peru |
| Apurimac River | 731 km | Mismi | Ene River | Peru |
| Atrato River | 650 km | Cordillera Occidental | Gulf of Uraba | Northwester Colombia |
| Tomo River | 650 km | ———– | Orinoco | Colombia |
| Vichada River | 580 km | ———— | Orinoco | Colombia |
| Icana River | 580 km | Guaviare Department | Rio Negro | Brazil, Colombia |
| Catatumbo River | 450 km | Cordillera Oriental | GE Oil and Gas | Colombia and Venezuela |
| Sinu River | 415 km | Antioquia | Caribbean Sea | Northwest Colombia |
| PatiaRiver | 400 km | Cordillera Occidental | Pacific Ocean | Colombia |
| San Juan River | 380 km | Cordillera Occidental | Pacific Ocean | Colombia |
| River Casiquiare River | 340 km | Orinoco | Rio Negro | Venezuela |
| Rio de la Plata River | 290 km | Confluence of Parana and Uruguay | Atlantic Ocean | Argentina and Uruguay |
| Oyapok River | 370 km | Tumuk Humak Mountain | Atlantic Ocean | Brazil and France |
| Zulia River | 310 km | Apartaderos | CatatumboRiver | Colombia and Venezuela |
| Ene River | 181 km | MantaroRiver and ApurimacRiver | Tambo River | Peru |
| TamboRiver | 159 km | PereneRiver, EneRiver | UrubambaRiver, UcayaliRiver | Peru |
| Baudo River | 150 km | Alto Del Buey | Pacific Ocean | Colombia |
| RioGuayasRiver | 60 km | Andes, Chimborazo | Gulf of Guayaquil | Ecuador |