Seimare Dam (Persian: سد سیمره), also known as Hini Mini or spelled Seymareh,[2] is an arch dam on the Seimare River in Badreh County, Ilam Province, Iran.

The primary purpose of the dam is hydroelectric power generation.

Studies for the dam were carried out in the mid to late 1970s and construction began on the diversion works in 1997.

The dam sits at the head of a 27,886 km2 (10,767 sq mi) catchment area and creates a reservoir with a 3,200,000,000 m3 (2,594,282 acre⋅ft) capacity.

The main spillway is controlled by two radial gates and has a maximum discharge capacity of 5,763 m3/s (203,518 cu ft/s).