Van Merlenhaven is a yacht marina operated by Watersportvereniging Van Merlenhaven in Heemstede, Noord-Holland.

It sits along the "staande mastroute," the inland route connecting the Zeeuwse waters with the IJsselmeer, and is accessible via the Ringvaart van de Haarlemmermeerpolder. The marina holds 58 permanent berths and a variable number of visitor berths.

The location is quietly situated near the Groenendaal forest and an indoor swimming pool. The town of Heemstede offers shops and restaurants within easy walking distance, and the provincial capital Haarlem is readily reachable by bicycle or bus.

Nearby attractions include the Linnaeushof and Museum de Cruquius.