title: Piranhas River (disambiguation)
text: # Piranhas River (disambiguation)
  
  The Piranhas River or Açu River is a river of northeastern Brazil.
  
  Piranhas River may also refer to:
  
  * Piranhas River (Goiás), in central Brazil
  * Piranhas River (lower Araguaia River tributary), in west-central Tocantins near Araguacema
  * Piranhas River (upper Araguaia River tributary), in northern Tocantins near Araguatins
  