The Guarapiranga River (in Portuguese: Rio Guarapiranga) is a river of São Paulo state in southeastern Brazil.
| Guarapiranga River | |
|---|---|
 At the foreground, the Pinheiros River; at the center, the Guarapiranga River; and at the background, the Reservoir of Guarapiranga. | |
 | |
| Native name | Rio Guarapiranga (Portuguese) |
| Location | |
| Country | Brazil |
| Region | São Paulo city, São Paulo state |
| Physical characteristics | |
| Source | |
| • location | Pinheiros River, São Paulo city |
| Mouth | |
• location | Reservoir of Guarapiranga, São Paulo city |