Dartmouth Dam, Embankment dam in Victoria, Australia

Dartmouth Dam is an embankment structure across the Mitta Mitta River with a wall standing about 180 meters high. The resulting reservoir stores large quantities of water for the region.

Construction of Dartmouth Dam began in 1973, engineered by the Snowy Mountains Engineering Corporation and completed in 1979 by Thiess Brothers at a cost of A$179 million. The Commonwealth, Victorian, New South Wales and South Australian governments each paid an equal share. Engineers Australia recognised the dam as a National Engineering Landmark in 2005.

The reservoir is a stocked trout fishery, restocked by the Victorian Department of Primary Industries, and anglers fish it in summer when snowmelt water is released down the Mitta Mitta. The dam was named after Dartmouth, the town submerged by the reservoir. In 2005 Engineers Australia recognised the dam as a National Engineering Landmark.

The area around the dam provides camping grounds, boat ramps, fishing areas, and barbecue facilities for various recreational activities. These amenities are readily accessible by walking paths and make for a practical day visit.

On 2 May 1990 two steel beams left in the penstock entered the running turbine, destroying the casing and machine block and shifting the equipment about 2 metres. The damaged station could not release water from the near-full reservoir, so large pipes were laid over the spillway to siphon it out.