List of tributaries of the Río de la Plata

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; 35°44′44″S 57°21′51″W[1] (Samborombón Bay); Río Salado at GEOnet Names Server.
  • Rio Vallimanca: right; AR.
• Samborombón River: right; AR; 35°43′0″S 57°20′50″W[1] (Samborombón Bay); GNS: Río Samborombón at GEOnet Names Server.
• Santa Lucía River: left; UR.
• Matanza River (Riachuelo): right; AR; 34°37′57″S 58°20′46″W;[1] Río Matanza at GEOnet Names Server.
• Luján River: right; AR; 34°25′55″S 58°32′28″W;[1] Río Luján at GEOnet Names Server.
  • Reconquista River: right; AR
• San Juan River (Uruguay): left; UR; 34°16′26″S 57°59′21″W;[1] Río San Juan at GEOnet Names Server.

• Uruguay River: left; AR, UY, BR; 35°43′0″S 57°20′50″W;[1] GNS: Uruguay River at GEOnet Names Server, Río Uruguay at GEOnet Names Server, Rio Uruguai at GEOnet Names Server.
  • San Salvador River (Uruguay): left; UY.
  • Río Negro (Uruguay): left; UY; 33°25′S 58°25′W;[1] GNS: Rio Negro at GEOnet Names Server.
    • Yí River: left; UY; 33°6′50″S 57°6′46″W;[1] Río Yi at GEOnet Names Server.
      • Porongos River: left; UY.
      • Chamangá River: left; UY.
  • Gualeguaychú River: right; AR; 33°4′45″S 58°25′0″W;[1] Río Gualeguaychú at GEOnet Names Server.
  • Queguay Grande River: right; UY.
    • Queguay Chico River: right; UY.
  • Daymán River: right; UY; 31°30′16″S 58°1′56″W;[1] Río Daymán at GEOnet Names Server.
  • Salto Grande Dam: AR, UY.
  • Arapey Grande River: right; UY
    • Arapey Chico River: right; UY.
  • Mocoretá River: right; AR.
  • Miriñay River: right; AR; 30°10′12″S 57°37′59″W;[1] Miriñay Río at GEOnet Names Server.
  • Quaraí River (Spanish Río Cuareim, Portuguese Rio Quaraí): left; UY, BR (border); 30°11′5″S 57°36′18″W;[1] Río Cuareim at GEOnet Names Server.
  • Ibicuí River: left; BR; 29°25′16″S 56°46′20″W;[1] Rio Ibicuí at GEOnet Names Server.
    • Itu River: right; BR; 29°24′37″S 55°51′2″W;[1] Rio Itu at GEOnet Names Server.
    • Santa Maria River (Rio Grande do Sul): left Ibicuí source; BR; 29°48′13″S 54°55′20″W;[1] Rio Santa Maria at GEOnet Names Server.
    • Ibicuí-Mirim River: right Ibicuí source; BR; 29°48′14″S 54°55′16″W;[1] Rio Ibicuí-Mirim at GEOnet Names Server.
  • Aguapey River: right; AR; 29°6′39″S 56°35′6″W;[1] Río Aguapey at GEOnet Names Server.
  • Icamaquã River: left; BR; 28°34′2″S 56°0′13″W;[1] Rio Icamaquã at GEOnet Names Server.
  • Ijuí River: left; BR; 27°58′3″S 55°20′1″W;[1] Rio Ijuí at GEOnet Names Server.
  • Santa Rosa River (Rio Grande do Sul): left; BR; 27°33′28″S 54°39′57″W;[1] Rio Santa Rosa at GEOnet Names Server.
  • Pepiri-Guazu River (Spanish Río Pepirí Guazú, Portuguese Rio Peperi Guaçu): right; AR, BR (border); 27°10′S 53°50′W;[2] Río Pepirí Guazú at GEOnet Names Server, Rio Peperi Guaçu at GEOnet Names Server.
  • Guarita River: left; BR.
  • Das Antas River (Rio Grande do Sul): right; BR.
  • Da Várzea River (Rio Grande do Sul): left; BR; 27°12′48″S 53°19′33″W;[1] Rio da Várzea at GEOnet Names Server.
  • Chapecó River: right; BR; 27°5′43″S 53°0′57″W;[1] Rio Chapecó at GEOnet Names Server.
    • Chapecozinho River: left; BR.
  • Passo Fundo River: left; BR; 27°17′8″S 52°41′26″W;[1] Rio Passo Fundo at GEOnet Names Server.
  • Irani River: right; BR; 27°14′23″S 52°32′38″W;[1] Rio Irani at GEOnet Names Server.
  • Do Peixe River (Santa Catarina): right; BR.
  • Forquetinha River: left; BR.
  • Canoas River (Santa Catarina): right Uruguay source; BR; 27°36′21″S 51°27′20″W;[1] Rio Canoas at GEOnet Names Server.
    • Campos Novos Dam: BR (Santa Catarina).
    • Caveiras River: left; BR.
    • Marombas River: right; BR (Santa Catarina); 27°25′18″S 50°45′16″W;[1] Rio Marombas at GEOnet Names Server.
  • Pelotas River: left Uruguay source; BR; 27°36′31″S 51°27′22″W;[1] Rio Pelotas at GEOnet Names Server.
    • 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; 34°0′5″S 58°23′37″W;[3] GNS: ??.
  • Arrecifes River: right; AR; 33°45′19″S 59°34′11″W;[1] Río Arrecifes at GEOnet Names Server.
  • Gualeguay River: left; AR; 33°19′0″S 59°38′0″W;[1] Río Gualeguay at GEOnet Names Server.
  • Nogoya River: left; AR; 32°55′S 59°59′W;[2] Arroyo Nogoyá at GEOnet Names Server, Río Nogoyá at GEOnet Names Server.
  • Arroyo del Medio; right; AR.
  • Saladillo Stream (Arroyo Saladillo or Río Saladillo): right; AR; 32°59′54″S 60°36′42″W;[1] Arroyo Saladillo at GEOnet Names Server, Río Saladillo at GEOnet Names Server.
  • Ludueña Stream: right; AR; 32°54′23″S 60°40′34″W;[1] Arroyo Ludueña at GEOnet Names Server.
  • Carcarañá River: right; AR; 32°26′32″S 60°48′13″W;[1] Río Carcarañá at GEOnet Names Server.
    • Tercero River (Calamuchita River): left Carcarañá source; AR; 32°54′54″S 62°19′29″W;[1] Río Tercero at GEOnet Names Server.
    • Cuarto River (Saladillo River, Chocancharava River): right Carcarañá source; AR; 32°54′55″S 62°19′29″W;[1] Río Cuarto at GEOnet Names Server.
  • Salado River (Argentina) (also Salado del Norte, Juramento River, Pasaje River, Calchaquí River): right; AR; 31°41′2″S 60°44′33″W;[1] Río Salado at GEOnet Names Server, Río Pasaje at GEOnet Names Server, Río Juramento at GEOnet Names Server.
    • Horcones River (variant: Río Rosario): right; AR (Santiago Estero and Salta); 26°35′S 63°58′W;[2] Río Horcones at GEOnet Names Server, Río Rosario at GEOnet Names Server.
      • Urueña River: right; AR (Santiago Estero and Salta); 26°14′S 64°30′W;[2] Río Urueña at GEOnet Names Server.
    • Arenales River
    • Rosario River
    • Guasamayo River
  • Feliciano River: left; AR; 31°5′25″S 59°53′46″W;[1] Arroyo Feliciano at GEOnet Names Server.
  • Guayquiraró River: left; AR; 30°24′46″S 59°34′47″W;[1] Río Guayquiraró at GEOnet Names Server.
  • Corrientes River: left, AR; 30°0′38″S 59°33′21″W;[1] Río Corrientes at GEOnet Names Server.
  • Paraná Miní River: right; AR; 29°5′9″S 59°24′21″W;[1] Río Paraná Miní at GEOnet Names Server.
    • Tapenagá River: right; AR; 28°4′46″S 59°9′18″W;[1] Río Tapenagá at GEOnet Names Server.
    • Palometa River: right; AR; 27°55′56″S 59°6′8″W;[1] Riacho Palometa at GEOnet Names Server.
  • Santa Lucía River: left; AR; 29°4′43″S 59°14′9″W;[1] Río Santa Lucía at GEOnet Names Server.
  • Negro River (Chaco): right; AR (Chaco); 27°28′8″S 58°53′48″W;[1] Río Negro at GEOnet Names Server.
  • Guaycurú River: right; AR (Chaco).

• • Paraguay River: right; AR, PA, BR; 27°17′21″S 58°36′29″W;[1] GNS: Río Paraguay at GEOnet Names Server.
    • Río de Oro: right; AR; 27°4′S 58°34′W;[2] Río de Oro at GEOnet Names Server.
    • Bermejo River (Teuco River): right; AR, BO; 26°52′S 58°23′W;[2] GNS: Río Bermejo at GEOnet Names Server.
      • Bermejito River: right (anabranch); AR; 25°39′S 60°11′W;[2] GNS: Río Bermejito at GEOnet Names Server.
        • Dorado River
      • Teuquito River
      • Seco River
      • San Francisco River: right; AR (Salta, Jujuy); 23°18′15″S 64°4′45″W;[1] Río San Francisco at GEOnet Names Server.
        • Grande River
        • Mojotoro River (Lavayén River)
      • Pescado River: right; AR; 22°59′48″S 64°20′12″W;[1] Río Pescado at GEOnet Names Server.
        • Iruya River: left; AR; 22°20′12″S 64°5′52″W;[1] Río Itaú at GEOnet Names Server.
      • Río Grande de Tarija: left; AR; 22°55′37″S 64°20′11″W;[1] Río Grande de Tarija at GEOnet Names Server.
        • Itaú River: left; AR and BO; 22°20′12″S 64°5′52″W;[1] Río Itaú at GEOnet Names Server.
      • Lipeo River: right; AR; 22°26′28″S 64°31′33″W;[1] Río Lipeo at GEOnet Names Server.
    • Tebicuary River; left; PY; 26°36′16″S 58°11′34″W;[1] Río Tebicuary at GEOnet Names Server.
    • Pilcomayo River: right; AR, BO: 25°21′S 57°40′W;[2] Río Pilcomayo at GEOnet Names Server.
      • Pilaya River (Bolivia)
        • San Juan del Oro River (Bolivia)
          • Río Grande de San Juan
    • Confuso River: right, PA; 25°7′57″S 57°32′31″W;[1] Río Confuso at GEOnet Names Server.
    • Salado River (Paraguay): left; PA; 25°6′26″S 57°28′38″W;[1] Río Salado at GEOnet Names Server.
    • Piribebuy River: left; PY.
    • Manduvirá River: left; PY; 24°57′30″S 57°18′28″W;[1] Río Salado at GEOnet Names Server.
    • Aguaray-Guazú River (Paraguay River): right; PY
    • Negro River (Paraguay): PY
    • Jejuí Guazú River: left; PA.
    • Monte Lindo River: PY
    • Ypané River: left; PY; 23°28′39″S 57°26′32″W;[1] Río Ypané at GEOnet Names Server.
    • Aquidabán River: left; PY
    • Verde River (Paraguay): PY
    • Apa River: left, PA, BR (border); 22°5′26″S 57°59′24″W;[1] Rio Apa at GEOnet Names Server.
      • 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); 19°24′46″S 57°19′55″W;[1] Rio Miranda at GEOnet Names Server.
      • 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); 19°14′20″S 57°13′15″W;[1] Rio Negro at GEOnet Names Server.
      • 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; 17°9′10″S 56°38′57″W;[1] Rio Cuiabá at GEOnet Names Server.
    • Paraguazinho River: left; BR (MG, Pantanal)
    • Cassanje River: left; BR (Mato Grosso, Pantanal);
    • Jauru River (Mato Grosso): right; BR; 16°20′41″S 57°46′55″W;[1] Rio Jauru at GEOnet Names Server.
      • Aguapeí River: right; BR (Mato Grosso); 15°52′23″S 58°23′55″W;[1] Rio Aguapeí at GEOnet Names Server.
    • Cabaçal River: right; BR (Mato Grosso); 15°59′52″S 57°42′19″W;[1] Rio Cabaçal at GEOnet Names Server.
    • 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); 25°35′33″S 54°35′27″W;[1] Rio Iguaçu at GEOnet Names Server, Río Iguazú at GEOnet Names Server
    • 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); 24°1′37″S 54°5′37″W;[1] Rio Piquiri at GEOnet Names Server.
    • Goio-Erê River: right; BR.
    • Cantú River: right; BR.
    • Do Cobre River: left; BR.
  • Ivaí River: left; BR (Paraná); 23°18′17″S 53°41′49″W;[1] Rio Ivaí at GEOnet Names Server.
    • 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); 22°39′30″S 53°5′23″W;[1] Rio Paranapanema at GEOnet Names Server.
    • Rosana Dam
    • Taquaruçu Dam
    • Capivara Dam
    • Tibagi River: left; BR (Paraná); 22°47′55″S 51°0′18″W;[1] Rio Tibagi at GEOnet Names Server.
      • 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); 22°54′43″S 49°57′57″W;[1] Rio Pardo at GEOnet Names Server.
    • 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); 23°36′1″S 48°26′33″W;[1] Rio Itapetininga at GEOnet Names Server.
  • Sérgio Motta Dam[4][5]
  • Pardo River (Mato Grosso do Sul): right; BR; 21°39′51″S 52°13′27″W;[1] Rio Pardo at GEOnet Names Server.
    • 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) Dam[5]
  • Sucuriú River: right; BR (Mato Grosse do Sul); 20°42′43″S 51°39′36″W;[1] Rio Sucuriú at GEOnet Names Server.
  • Tietê River: left; BR (São Paulo); 20°37′40″S 51°33′54″W;[1] Rio Tietê at GEOnet Names Server.
    • Três Irmãos Dam
    • Nova Avanhandava Dam
    • Promissão Dam
    • Ibitinga Dam
    • Bariri Dam
    • Barra Bonita Dam
    • Piracicaba River: right; BR (São Paulo); 22°36′53″S 48°19′12″W;[1] Rio Piracicaba at GEOnet Names Server.
    • Anhembi Dam
    • Laras Dam
    • Sorocaba River: left; BR; 22°58′56″S 47°48′24″W;[1] Rio Sorocaba at GEOnet Names Server.
      • Ituparanga Dam
      • Sarapuí River (São Paulo): left; BR.
    • Capivari River (Tietê River): right; BR; 22°59′3″S 47°45′51″W;[1] Rio Capivari at GEOnet Names Server.
    • Jundiaí River (upper Tietê River): right; BR; 23°12′41″S 47°17′34″W;[1] Rio Jundiaí at GEOnet Names Server.
    • Pinheiros River: left; BR (São Paulo state and São Paulo city); 23°31′36″S 46°45′0″W;[1] Rio Pinheiros at GEOnet Names Server.
      • Rio Grande (Pinheiros River): left; São Paulo City.
        • Guarapiranga (reservoir): São Paulo City.
      • Billings Reservoir: São Paulo City.
  • Ilha Solteira Dam[6]
  • São José dos Dourados River: left; BR (São Paulo); 20°22′22″S 51°19′22″W;[1] Rio São José dos Dourados at GEOnet Names Server.
  • Grande River: left Paraná source; BR (São Paulo and Minas Gerais border); 20°4′41″S 50°59′41″W;[1] Rio Grande at GEOnet Names Server.
    • Água Vermelha Dam
    • Turvo River (Grande River): left; BR (São Paulo); 19°56′59″S 49°53′54″W;[1] Rio Turvo at GEOnet Names Server.
    • Marimbondo Dam
    • Pardo River (São Paulo): left; BR; 20°10′12″S 48°38′40″W;[1] Rio Pardo at GEOnet Names Server.
      • Moji-Guaçu River: left; BR (São Paulo); 20°53′16″S 48°10′39″W;[1] Rio Moji-Guaçu at GEOnet Names Server.
      • 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); 20°4′43″S 51°0′22″W;[1] Rio Iguaçu at GEOnet Names Server, Rio Paranaíba at GEOnet Names Server.
    • Aporé River: right; BR (Goiás and Mato Grosse do Sul border); 19°27′29″S 50°56′26″W;[1] Rio Aporé at GEOnet Names Server.
    • Corrente River (Paranaíba River): right; BR (Goiás); 19°18′42″S 50°50′19″W;[1] Rio Corrente at GEOnet Names Server.
    • Claro River (Paranaíba River): right; BR (Goiás); 19°7′56″S 50°38′40″W;[1] Rio Claro at GEOnet Names Server.
      • Doce River (Goiás): left; BR; 18°21′24″S 51°14′17″W;[1] Rio Doce at GEOnet Names Server.
    • São Simão Dam
    • Tijuco River: left; BR (Minas Gerais); 18°40′49″S 50°4′8″W;[1] Rio Tijuco at GEOnet Names Server.
      • 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); 18°32′39″S 49°35′48″W;[1] Rio Meia Ponte at GEOnet Names Server.
    • Cachoeira Dourada Dam
    • Itumbiara Dam
    • Araguari River (Minas Gerais) (also Das Velhas River): left; BR; 18°20′42″S 48°38′5″W;[1] Rio Araguari at GEOnet Names Server
      • Uberabinha River:
      • Quebra-Anzol River:
    • Emborcação Dam
    • São Marcos River: right; BR; 18°14′44″S 47°36′44″W;[1] Rio São Marcos at GEOnet Names Server.
    • Verde River (upper Paranaíba River): right; BR; 23°36′1″S 48°26′33″W;[1] Rio Verde at GEOnet Names Server.

Map showing the Río de la Plata drainage basin and major tributaries