Rosario River
A view of Rosario River
Location
Country	Uruguay
Physical characteristics
Source
- location	Cuchilla Grande Inferior
Mouth	Rio de la Plata
- coordinates	34°26′00″S 57°21′02″W / 34.4334°S 57.3505°W / -34.4334; -57.3505
Length	80 km (50 mi)[1]
Basin size	1,745 km2 (674 sq mi)[2]

The Rosario River (Spanish: Río Rosario) is a river in the Colonia Department in Uruguay. The river starts in Cuchilla Grande Inferior. It is near the border with the departments of San José, Flores, and Soriano, and flows into the Río de la Plata.

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