| Guarani River | |
| Source1 Location: | Paraná state |
| Mouth: | Iguazu River |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
The Guarani River is a river of Paraná state in southern Brazil. The Guaraní River is a waterway in South America, primarily flowing through Paraguay and Argentina. It's a tributary of the Paraná River, one of the continent's major rivers. The Guaraní River plays a significant role in the region's ecology and economy, supporting various ecosystems and serving as a transportation route for goods and people. It's named after the indigenous Guaraní people who historically inhabited the area.