| Aguapeí River | |
| Pushpin Map: | Brazil |
| River System: | Paraná River |
| Source1 Location: | São Paulo state |
| Mouth Coordinates: | -21.0508°N -51.7669°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
The Aguapeí River (Portuguese: Rio Aguapeí) is a river of São Paulo state in southeastern Brazil. It is a left tributary of the Paraná River.
The lower reaches of the Aguapeí River flow through the Aguapeí State Park, created in 1998, which is about upstream from the point where the Aguapeí the Paraná River.The park contains large areas of floodplain, and is flooded in the rainy season when the Aguapeí overflows its banks.The mouth of the river is protected by the Mouth of the Aguapeí Private Natural Heritage Reserve, created in 2010.