Pietrosul may refer to the following rivers in Romania:
Pietrosul, a tributary of the Mureș in Harghita County Pietrosul, a tributary of the Siret in Iași County Pietrosul, a tributary of the Sulța in Bacău County Pietrosul, a tributary of the Tazlăul Sărat in Bacău County
See also Pietrosu (disambiguation) Pârâul Pietros (disambiguation)