Manton Dam is a reservoir formed by a decommissioned concrete arch dam on the Manton River, located approximately 70 km south of Darwin in the Northern Territory of Australia. The dam was originally constructed in 1942 to supply drinking water to Darwin and was opened for public recreation in 1989. The reservoir sits within a conservation area managed by Parks and Wildlife NT, surrounded by woodland fringe and varied habitats that support ducks, waders, woodland birds, reptiles, and mammals.

The reservoir is divided into distinct zones that separate different watercraft activities. Canoes and kayaks are directed to the low-speed boat zone, where a speed limit of less than 5 knots applies. This zone operates alongside a dedicated powerboat and water ski zone and a jet-ski zone, so paddlers should be aware of motorised craft activity on the water, particularly on weekends when the area is heavily used. A prohibited access zone exists to protect water quality, and paddlers must observe these boundaries.

Swimming is not recommended due to water quality concerns and the potential presence of saltwater crocodiles. All craft must carry required safety equipment as per the applicable by-laws, which are posted at the boat ramp. The dam wall and spillway area remain closed to the public as an operational zone.

The area is accessible year-round via sealed roads turning west off the Stuart Highway, roughly 70 km south of Darwin. A boat ramp is available for launching. The park is open weekdays from 9am to 5pm and weekends from 8am to 7pm. Picnic areas with barbecues and tables are located in shaded spots throughout the recreation area, and toilet facilities are available. Non-NT residents are required to purchase an NT Parks Visitor Pass before arrival.

The reservoir is stocked with fish species, and the surrounding woodland and water's edge attract a variety of birdlife, making the paddling experience one that combines open water with wildlife observation opportunities. The area holds cultural significance for several Aboriginal language groups including the Larrakia, Limilngan, Wulna, Waray, and Koongurrukun peoples.