Monster (population: 20,250) is a town in the western Netherlands, in the province of South Holland. The municipality covers an area of 20.15 km² (of which 5.70 km² water).
The municipality of Monster also includes the following towns, villages and townships: Poeldijk[?], Ter Heijde[?].
... The average household size is 2.57 and the average family size is 3.08.
In the town the population is spread out with 22.3% under the age of 18, 6.3% from 18 to 24, ...