Pârâul Rău may refer to the following rivers in Romania:

Pârâul Rău, a tributary of the Ghimbav in Argeș County Pârâul Rău, a tributary of the Ilișoara Mare in Mureș County Pârâul Rău, a tributary of the Olteț in Gorj County Pârâul Rău, a tributary of the Târzia in Neamț County