The Tacuarí River is a river in Cerro Largo Department, Uruguay.[1] It has its source in the Cuchilla Grande in Cerro Largo and runs southeast to the Treinta y Tres Department where it flows into the Lagoon Mirim.
Its river basin covers approximately 3600 km². Waters deriving from this river are primarily used for irrigation in the region's agriculture interest.[2]
Tacuarí is an herb that grows along the shorelines of the river that is used to prepare mate.