| Río Blanco | |
| Mouth Location: | Jáchal River |
| Subdivision Type1: | Country |
| Subdivision Name1: | Argentina |
The Río Blanco (Spanish for "white river") is a river of Argentina that rises high in the mountains west of San José de Jáchal in the northern part of the province of San Juan. It is a tributary of the Jáchal River which empties into the Desaguadero River basin.