Bleiswijk
is a town and former municipality in the western Netherlands, in the province of South Holland. The municipality had a population of 10,222 in 2006, and covered an area of 21.96 km² of which 0.83 km² is water. On 1 January 2007, the town was merged with neighbouring towns Bergschenhoek and Berkel en Rodenrijs to form the new municipality Lansingerland.