| Roncador River | |
| Pushpin Map: | Brazil |
| River System: | Manso River |
| Mouth Location: | Chapada dos Guimarães, MT |
| Mouth Coordinates: | -15.0361°N -55.5134°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
| Tributaries Left: | Casca River |
The Roncador River (Portuguese: Rio Roncador) is a river of the state of Mato Grosso, Brazil. It is a tributary of the Manso River.
The Casca River joins the Roncador River in an arm of the Manso Dam.