Piraqueaçu River

{{Infobox river

| name = Piraquê Açu River

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| pushpin_map = Brazil

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| source1_location = Espírito Santo state

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| mouth_location = Atlantic ocean

| mouth_coordinates = {{coord|-19.951452|-40.152466|display=inline,title}}

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| subdivision_type1 = Country

| subdivision_name1 = Brazil

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The Piraquê Açu River is a river of Espírito Santo state in eastern Brazil.

Part of the river basin is contained in the {{convert|3562|ha}} Augusto Ruschi Biological Reserve, a fully protected area.{{citation|language=Portuguese |title=Unidade de Conservação: Reserva Biológica Augusto Ruschi|publisher=MMA: Ministério do Meio Ambiente |url=http://sistemas.mma.gov.br/cnuc/index.php?ido=relatorioparametrizado.exibeRelatorio&relatorioPadrao=true&idUc=191|accessdate=2016-04-19}}