Mariëndijk is a hamlet in the Dutch province of South Holland which lies on the border of Honselersdijk and the grounds of the former Paleis Honselersdijk Huis Honselaarsdijk. Today, the hamlet is a part of the municipality of the Westland. It is situated 1.6km north of Naaldwijk, 6 km east of the beaches at Monster and Ter Heide, 2km southwest of The Hague, 8 km west of Delft and 10 km northeast of Hook of Holland.