| Iapó River | |
| Pushpin Map: | Brazil |
| River System: | Tibagi River |
| Source1 Location: | Paraná state |
| Mouth Coordinates: | -24.5029°N -50.4115°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
The Iapó River (Portuguese: Rio Iapó ) is a river of Paraná state in southern Brazil. It is a tributary of the Tibagi River.
The river is known for the scenic Guartelá Canyon, which is protected by the Guartelá State Park, created in 1992.