Coolalingo Waterfall is a scenic waterfall located in Glenmalure Forest, on Carriglinneen in County Wicklow. Surrounded by lush greenery and trees, it is described as a serene and special place, and is regarded as one of Ireland's notable wild swim spots.

Its Irish name translates roughly as the "nook of leaping water." Situated about 1. 5 hours from Dublin, the waterfall is accessible as a relatively short walk and sits near castle ruins, adding a layer of historical character to the natural setting.

It draws hikers, swimmers, and photographers exploring the wilder corners of the Wicklow uplands.