Copacá River

{{Infobox river

| name = Copacá River

| native_name ={{native name|pt|Rio Copacá}}

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| pushpin_map = Brazil

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| river_system = Uarini River

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| mouth_coordinates = {{coord|-3.350892|-65.764815|display=inline,title}}

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| subdivision_type1 = Country

| subdivision_name1 = Brazil

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The Copacá River ({{langx|pt|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 {{convert|187982|ha}} Baixo Juruá Extractive Reserve, created in 2001.{{sfn|Unidade de Conservação ... MMA}}

The Copacá is a {{convert|25|m}} wide river that lies within the eastern limit of the reserve.{{sfn|Carvalho|Fidelis|Arruda|Galuch|2013|p=87}}

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.{{sfn|Carvalho|Fidelis|Arruda|Galuch|2013|p=89}}