| Toa Vaca River | |
| Subdivision Type1: | Commonwealth |
| Subdivision Name1: | Puerto Rico |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Villalba |
| Source1 Elevation: | 538 ft. |
The Río Toa Vaca (Spanish; Castilian: Río Toa Vaca) is a river of Villalba and Coamo, Puerto Rico.