Darbandikhan Dam, Embankment dam in Sulaymaniyah Governorate, Iraq.

Darbandikhan Dam is an embankment dam across the Diyala River in Iraq, built with clay and rock material. It holds a large reservoir and operates through turbine generators to supply power to the region.

Construction started in 1956 under designs by an American engineering firm and was completed in 1961. The filling of the reservoir then allowed hydroelectric generation to begin in the region.

The dam's reservoir is known as Darbandikhan Lake, formed after the Diyala River was impounded in November 1961. The lake and its shores are used for recreation, including fishing, swimming and boating, and the dam itself is a destination for visitors from Sulaymaniyah, about 40 km to the east.

The dam lies about 40 km west of Sulaymaniyah and is reached by car; the road to it passes through mountain terrain. The crest is 17 m wide and 445 m long, with the chute spillway on the right bank. The power station sits at the toe of the dam, below the tail-races.

The dam's spillway is fitted with three 15 m by 15 m tainter gates, each ending in a ski-jump to dissipate the energy of falling water. Its maximum discharge capacity is 11,400 m3/s. The gates were removed in 1988 during the Iran–Iraq War and new ones installed in 1989–1990.