Jaguarao River
General data
- Name: Jaguarao River
- Water system: Lagoa dos Patos
- Water type: River
- Progression: Lagoon Mirim -> Sao Goncalo Channel -> Lagoa dos Patos -> Rio Grande Channel -> Atlantic Ocean -> Planet Earth
- Climates: Tropical
- Continents: South America
- Countries: Brazil, Uruguay
The Jaguarão or Yaguarón River (Portuguese: Rio Jaguarão, Spanish: Río Yaguarón) is a Brazilian and Uruguayan river. It forms the border between Uruguay and Rio Grande do Sul state in southernmost Brazil. The river originates in Serras de Sudeste (Southeastern Mountain Ranges) and flows east to empty into Lagoa Mirim (Portuguese) / Laguna Merín (Spanish), which is a large coastal lagoon, which is indirectly connected to the Atlantic Ocean.