The Copacá River (Portuguese: Rio Copacá) is a river of Amazonas, Brazil.

The Copacá River defines the eastern boundary of the 187,982 hectares (464,510 acres) Baixo Juruá Extractive Reserve, created in 2001.

[1] The Copacá is a 25 metres (82 ft) wide river that lies within the eastern limit of the reserve.

[2] 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.

This article related to a river in the Brazilian state of Amazonas is a stub.