Dammträsk (Swedish for "Pond Swamp") is a small man made lake within the Tyresån Lake System, located in Haninge Municipality, south of central Stockholm, Sweden.

Located just south of the residential area Kvarntorp, and north of the densely populated central Haninge, the wetland lake receives considerable amount of nutritive salts.

Two abandoned facilities by the lake, a dry cleaner and a gas station, contaminated the surrounding area.

[5] An inventory of the local vegetation concluded there are 27 species of vascular plants around the lake, which makes it relatively biodiverse (3/5 on a scale where 1 means high biodiversity).

One of the interesting species of aquatic plants in the lake is Common Mare's Tail.