Poulaphouca, officially Pollaphuca (Irish: Poll a' Phúca, meaning "the Púca's hole"), is a townland in County Wicklow, Ireland, on the border with County Kildare. It is primarily known for its hydroelectric generating station and artificial lake, known as Poulaphouca Reservoir, Poulaphouca Lake, or Blessington Lake. The once famous Poulaphouca Waterfall has little water running over it any longer because of the hydroelectric project.