| Paraitinga River | |
| Source1 Location: | São Paulo state |
| Mouth: | Tietê River |
| Mouth Location: | near Biritiba-Mirim |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
The Paraitinga River is a river of São Paulo state in southeastern Brazil. The Paraitinga is a tributary of the Tietê River, which it enters near Biritiba-Mirim.