The Arpaș () is a left tributary of the river Olt in Romania. It discharges into the Olt in Arpașu de Jos.Arpasul / Arpasul Mare (jud. Sibiu), e-calauza.ro The source of the Arpaș is in the Făgăraș Mountains. Its length is and its basin size is .
Hydronymy
The Hungarian name means "barley". The Romanian name derives from that.
References