Monster is a town in the Dutch province of South Holland. It is a part of the municipality of Westland, and lies about 10 km south-west of The Hague. The village of "Monster" has a population of around 11,580. The statistical area "Monster", which also can include the surrounding countryside, has a population of around 14,540. Until 2004 it was a separate municipality and covered an area of 20.15 km² (of which 5.70 km² is water). The former municipality of Monster also included the towns, Poeldijk and Ter Heijde. Monster and Ter Heijde are towns on the North Sea coast and have a popular beach.