| Copacá River | |
| Pushpin Map: | Brazil |
| River System: | Uarini River |
| Mouth Coordinates: | -3.3509°N -65.7648°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
The Copacá River (Portuguese: Rio Copacá) is a river of Amazonas, Brazil. It is a right tributary of the Uarini River.
The Copacá River defines the eastern boundary of the Baixo Juruá Extractive Reserve, created in 2001.The Copacá is a wide river that lies within the eastern limit of the reserve.The floating litter banks of the river are home to a variety of allochthonous insectivore species of fish, particularly of the genera Microglanis and Phenacorhamdia.