Cinciș Lake, Barrier lake in Poiana Rusca Mountains, Romania.

Cinciș Lake is a barrier lake in the Poiana Rusca Mountains covering 867 hectares with a maximum depth of 48 meters. Multiple sandy beaches line its shores, providing places for swimming and relaxation along the Hunedoara region.

The lake was created in 1963–64 by damming the Cerna River to supply water to the ironworks at Hunedoara. The villages of Csolnakos, Cserna, Királybánya, Ploszka, Bălana and Moara Ungurului were submerged, and their residents moved to Csolnakoscserna on the northeastern shore. The dam, built south of Felsőtelek, is 48 meters high and used 62,000 m³ of concrete.

The lake takes its name from the village of Cinciș, which was submerged when the reservoir was created. The villages of Csolnakos, Cserna, Királybánya, Ploszka, Bălana and Moara Ungurului were also flooded, and their residents were moved to the new village of Cinciș-Cerna on the north-eastern shore. Near the south-western tip, on a peninsula, stand the ruins of Királybánya's 18th-century Roman Catholic church.

The shoreline has several lodging options including three motels, two camping areas, and various guesthouses to suit different needs. These facilities make it straightforward to plan a visit or longer stay.

The dam near Felsőtelek rises 48 metres from foundation to crest and used 62,000 cubic metres of concrete. When the water drops, the ruins of flooded houses appear, not a medieval church. A 1.5-megawatt power plant was added to the dam in 1983.