Langebæk is a town with a population of 242 (1 January 2015) and a former municipality (Danish, kommune) in Region Sjælland on the southeastern tip of the island of Zealand (Sjælland) in south Denmark. The municipality included the islands of Langø, Tærø and Lilleø, and it covered an area of 101 km². It had a total population of 6,332 (2005). Its last mayor was Henrik Holmer, a member of the Social Democrats (Socialdemokraterne) political party.