Honselersdijk is a town in the Dutch province of South Holland. It is home to the historic Huis Honselaarsdijk, former palatial estate of the Dutch Princes of Orange. Huis Honselaarsdijk was one of the finest examples of Baroque architecture and grounds in the history of The Netherlands. Today, only part of the outbuildings remain, and these are referred to locally as "De Nederhof".
Honselersdijk is part of the municipality of Westland, and lies about 2.6 km southwest of the border of The Hague, with a population of approximately 5,180.
The statistical area "Honselersdijk", which also includes the surrounding countryside and part of the hamlet Mariëndijk, has a total population of approximately 7,460.
Today, Honselersdijk is home to one of the largest flower auctions in the world, Royal Flora Holland.