Maassluis is a town located in the western part of the Netherlands within the province of South Holland. It serves as a residential and geographic area characterized by its specific land and water distribution.
As of 2021, the municipality had a population of 33,567 residents. The total area covered by the municipality is 10.12 square kilometers (3.91 square miles), of which 1.64 square kilometers (0.63 square miles) consists of water.