This is a list of tributaries of the Río de la Plata, or rivers of the La Plata Basin. Tributaries and sub-tributaries are hierarchically listed in order from the mouth of the Río de la Plata upriver. The terms "right" and "left" indicate on which side of the main stem river a tributary is located, from the perspective of looking downriver, following standard river bank terminology usage. Countries are identified in abbreviated form: AR for Argentina, UY for Uruguay, PY or PA for Paraguay, BR for Brazil, and BO for Bolivia. Major dams are also noted.

Salado River: right; AR; GNS coordinates adjusted using Google Maps and GeoLocator (Samborombón Bay); . Rio Vallimanca: right; AR. Samborombón River: right; AR; (Samborombón Bay); GNS: . Santa Lucía River: left; UR. Matanza River (Riachuelo): right; AR; ; . Luján River: right; AR; ; . Reconquista River: right; AR San Juan River (Uruguay): left; UR; ; .

Uruguay River: left; AR, UY, BR; ; GNS: , , . San Salvador River (Uruguay): left; UY. Río Negro (Uruguay): left; UY; ; GNS: . Yí River: left; UY; ; . Porongos River: left; UY. Chamangá River: left; UY. Gualeguaychú River: right; AR; ; . Queguay Grande River: right; UY. Queguay Chico River: right; UY. Daymán River: right; UY; ; . Salto Grande Dam: AR, UY. Arapey Grande River: right; UY Arapey Chico River: right; UY. Mocoretá River: right; AR. Miriñay River: right; AR; ; . Quaraí River (Spanish Río Cuareim, Portuguese Rio Quaraí): left; UY, BR (border); ; . Ibicuí River: left; BR; ; . Itu River: right; BR; ; . Santa Maria River (Rio Grande do Sul): left Ibicuí source; BR; ; . Ibicuí-Mirim River: right Ibicuí source; BR; ; . Aguapey River: right; AR; ; . Icamaquã River: left; BR; ; . Ijuí River: left; BR; ; . Santa Rosa River (Rio Grande do Sul): left; BR; ; . Pepiri-Guazu River (Spanish Río Pepirí Guazú, Portuguese Rio Peperi Guaçu): right; AR, BR (border); ; , . Guarita River: left; BR. Das Antas River (Rio Grande do Sul): right; BR. Da Várzea River (Rio Grande do Sul): left; BR; ; . Chapecó River: right; BR; ; . Chapecozinho River: left; BR. Passo Fundo River: left; BR; ; . Irani River: right; BR; ; . Do Peixe River (Santa Catarina): right; BR. Forquetinha River: left; BR. Canoas River (Santa Catarina): right Uruguay source; BR; ; . Campos Novos Dam: BR (Santa Catarina). Caveiras River: left; BR. Marombas River: right; BR (Santa Catarina); ; . Pelotas River: left Uruguay source; BR; ; . Vacas Gordas River: BR Pelotinhas River: BR Lava-Tudo River: BR São Mateus River (Santa Catarina): BR Antoninha River: BR Da Divisa River: BR Sumidouro River: BR Púlpito River: BR

Paraná River: right; AR, PA, BR; ; (main distributary) GNS: ??. Arrecifes River: right; AR; ; . Gualeguay River: left; AR; ; . Nogoya River: left; AR; ; , . Arroyo del Medio; right; AR. Saladillo Stream (Arroyo Saladillo or Río Saladillo): right; AR; ; , . Ludueña Stream: right; AR; ; . Carcarañá River: right; AR; ; . Tercero River (Calamuchita River): left Carcarañá source; AR; ; . Cuarto River (Saladillo River, Chocancharava River): right Carcarañá source; AR; ; . Salado River (Argentina) (also Salado del Norte, Juramento River, Pasaje River, Calchaquí River): right; AR; ; , , . Horcones River (variant: Río Rosario): right; AR (Santiago Estero and Salta); ; , . Urueña River: right; AR (Santiago Estero and Salta); ; . Arenales River Rosario River Guasamayo River Feliciano River: left; AR; ; . Guayquiraró River: left; AR; ; . Corrientes River: left, AR; ; . Paraná Miní River: right; AR; ; . Tapenagá River: right; AR; ; . Palometa River: right; AR; ; . Santa Lucía River: left; AR; ; . Negro River (Chaco): right; AR (Chaco); ; . Guaycurú River: right; AR (Chaco).

Paraguay River: right; AR, PA, BR; ; GNS: . Río de Oro: right; AR; ; . Bermejo River (Teuco River): right; AR, BO; ;Coords from GNS GNS: . Bermejito River: right (anabranch); AR; ;Coords from GNS GNS: . Dorado River Teuquito River Seco River San Francisco River: right; AR (Salta, Jujuy); ; . Grande River Mojotoro River (Lavayén River) Pescado River: right; AR; ; . Iruya River: left; AR; ; . Río Grande de Tarija: left; AR; ; . Itaú River: left; AR and BO; ; . Lipeo River: right; AR; ; . Tebicuary River; left; PY; ; . Pilcomayo River: right; AR, BO: ; . Pilaya River (Bolivia) San Juan del Oro River (Bolivia) Río Grande de San Juan Confuso River: right, PA; ; . Salado River (Paraguay): left; PA; ; . Piribebuy River: left; PY. Manduvirá River: left; PY; ; . Aguaray-Guazú River (Paraguay River): right; PY Negro River (Paraguay): PY Jejuí Guazú River: left; PA. Monte Lindo River: PY Ypané River: left; PY; ; . Aquidabán River: left; PY Verde River (Paraguay): PY Apa River: left, PA, BR (border); ; . Perdido River (Mato Grosso do Sul): right; BR (Mato Grosso do Sul). Caracol River (Mato Grosso do Sul): right; BR (Mato Grosso do Sul). Amanguijá River: left; BR (Mato Grosso do Sul). Tarunã River: left; BR (Mato Grosso do Sul). Tererê River: left; BR (Mato Grosso do Sul). Branco River (Mato Grosso do Sul): left; BR (Mato Grosso do Sul). Aquidabã River (Mato Grosso do Sul): left; BR (Mato Grosso do Sul). Novo River (Paraguay River): right; BR (Mato Grosso do Sul). Miranda River (Brazil): left; BR (Mato Grosso do Sul); ; . Aquidauana River: right; BR (Mato Grosso do Sul). Salobra River: left; BR (Mato Grosso do Sul). Negro River (Mato Grosso do Sul): left; BR (Mato Grosso do Sul); ; . Taboco River: left; BR (Mato Grosso do Sul). Inhumas River (Mato Grosso do Sul): right; BR (Mato Grosso do Sul). Taquari-Mirim River (Mato Grosso do Sul): left; BR (Mato Grosso do Sul). Cuiabá River: BR; ; . Paraguazinho River: left; BR (MG, Pantanal) Cassanje River: left; BR (Mato Grosso, Pantanal); Jauru River (Mato Grosso): right; BR; ; . Aguapeí River: right; BR (Mato Grosso); ; . Cabaçal River: right; BR (Mato Grosso); ; . Vermelho River (Mato Grosso): right; BR (MG). Sepotuba River: left; BR (MG).

(Paraná River above Paraguay confluence) Yacyretá Dam: AR, PY. Iguazu River (Portuguese Rio Iguaçu, Spanish Río Iguazú, also Rio Iguassu): left; BR, AR (partially border); ; , San Antonio River: left; BR, AR (border). Chopim River: left; BR. Salt Santiago Dam Jordão River (Paraná): right; BR. Iratim River: left; BR. São Francisco River (Paraná): left; BR (Paraná). Piquiri River: left; BR (Paraná); ; . Goio-Erê River: right; BR. Cantú River: right; BR. Do Cobre River: left; BR. Ivaí River: left; BR (Paraná); ; . Ligeiro River: left; BR. Corumbataí River (Paraná): left; BR. Ivinhema River: right; BR (Mato Grosso do Sul). Paranapanema River: left; BR (Paraná and São Paulo border); ; . Rosana Dam Taquaruçu Dam Capivara Dam Tibagi River: left; BR (Paraná); ; . Iapó River: right; BR (Paraná). Das Cinzas River: left; BR (Paraná). Laranjinha River: left; BR (Paraná). Salto Grande Dam Pardo River (Paranapanema River): right; BR (São Paulo); ; . Xavantes Dam Itararé River: left: BR (Paraná and São Paulo border). Taquari-Guaçu River: left; BR (São Paulo). Apiai-Guaçu River: left; BR (São Paulo). Itapetininga River: right; BR (São Paulo); ; . Sérgio Motta DamSanta Catarina State Road Map, Ministério dos Transportes Pardo River (Mato Grosso do Sul): right; BR; ; . Anhanduí River: right; BR. Do Peixe River (Paraná River): left; BR (São Paulo). Verde River (Mato Grosso do Sul): right; BR. São Domingos River (Mato Grosso do Sul): left; BR. Aguapeí River (São Paulo): right; BR. Eng Souza Dias (Jupiá) DamMato Grosso do Sul State Road Map, Brazil 2001, Ministério dos Transportes Sucuriú River: right; BR (Mato Grosse do Sul); ; . Tietê River: left; BR (São Paulo); ; . Três Irmãos Dam Nova Avanhandava Dam Promissão Dam Ibitinga Dam Bariri Dam Barra Bonita Dam Piracicaba River: right; BR (São Paulo); ; . Anhembi Dam Laras Dam Sorocaba River: left; BR; ; . Ituparanga Dam Sarapuí River (São Paulo): left; BR. Capivari River (Tietê River): right; BR; ; . Jundiaí River (upper Tietê River): right; BR; ; . Pinheiros River: left; BR (São Paulo state and São Paulo city); ; . Rio Grande (Pinheiros River): left; São Paulo City. Guarapiranga (reservoir): São Paulo City. Billings Reservoir: São Paulo City. Ilha Solteira DamSão Paulo State Road Map, Brazil 2001, Ministério dos Transportes São José dos Dourados River: left; BR (São Paulo); ; . Grande River: left Paraná source; BR (São Paulo and Minas Gerais border); ; . Água Vermelha Dam Turvo River (Grande River): left; BR (São Paulo); ; . Marimbondo Dam Pardo River (São Paulo): left; BR; ; . Moji-Guaçu River: left; BR (São Paulo); ; . Moji-Mirim River: left?; BR. Porto Colõmbia Dam Volta Grande Dam Igarapava Dam Jaguará Dam Luiz Barreto (Estreito) Dam Furnas Dam Camargos Dam Paranaíba River: right Paraná source; BR (Minas Gerais and Goiás, border in part); ; , . Aporé River: right; BR (Goiás and Mato Grosse do Sul border); ; . Corrente River (Paranaíba River): right; BR (Goiás); ; . Claro River (Paranaíba River): right; BR (Goiás); ; . Doce River (Goiás): left; BR; ; . São Simão Dam Tijuco River: left; BR (Minas Gerais); ; . Da Prata River (Tijuco River): left; BR. Dos Bois River (Paranaíba River): right; BR (Goiás). Rio Verdão: right; BR. Meia Ponte River: right; BR (Goiás); ; . Cachoeira Dourada Dam Itumbiara Dam Araguari River (Minas Gerais) (also Das Velhas River): left; BR; ; Uberabinha River: Quebra-Anzol River: Emborcação Dam São Marcos River: right; BR; ; . Verde River (upper Paranaíba River): right; BR; ; .

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