De Koenen is a yacht harbor situated on the Nieuwe Meer in Amsterdam, tucked within the Amsterdamse Bos on the southern edge of the city. The marina accommodates up to 80 vessels and has a maximum draft of 2 meters.

It is easily reached from the Amsterdam ring road via the Amstelveen exit. From De Koenen, boaters can head west onto the Nieuwe Meer toward the Ringvaart, or travel northeast into Amsterdam via the Schinkel and Kostverlorenvaart waterways.

Sailboats with standing masts should note that railway bridges over the Schinkel and Kostverlorenvaart have a vertical clearance of 2. 5 meters and open only around midnight.

The harbor has been a fixture in this area since at least the early twentieth century, with the adjacent Jollenpad path providing road-side access along the Jachthavenweg.