| Jundiaí River | |
| Source1 Location: | São Paulo state |
| Mouth Location: | Tietê River |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
The Jundiaí River (Portuguese, Rio Jundiaí) is a river of São Paulo state in southeastern Brazil. It is a tributary of the Tietê River, which it joins in Mogi das Cruzes.