| Guarapiranga River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
| Subdivision Type2: | Region |
| Subdivision Name2: | São Paulo city, São Paulo state |
| Source1 Location: | Pinheiros River, São Paulo city |
| Mouth Location: | Reservoir of Guarapiranga, São Paulo city |
The Guarapiranga River (in Portuguese: Rio Guarapiranga) is a river of São Paulo state in southeastern Brazil.