Râu de Mori (Hungarian: Malomvíz, German: Mühlendorf) is a commune in Hunedoara County, Transylvania, Romania.

It is composed of eleven villages: Brazi (Gureny), Clopotiva (Klopotiva), Ohaba-Sibișel (Ohábasibisel), Ostrov (Nagyosztró), Ostrovel (Osztrovel), Ostrovu Mic (Kisosztró), Râu de Mori, Sibișel (Sebeshely), Suseni (Malomvízszuszény), Unciuc (Uncsukfalva), and Valea Dâljii (Vályadilsi).

The commune is situated at a mean altitude of 506 m (1,660 ft), at the foot of the Retezat Mountains.

The Gura Apelor Dam forms a reservoir, from which water is piped to the Râul Mare Hydroelectric Power Station, that generates 650 GWh of electricity per year.

It is situated in the historical and ethnographical area known as Țara Hațegului, 17 km (11 mi) southeast of its hub, the town of Hațeg.