Kozakkenhaven is a marina and visitor harbour located in De Hank, a dead side channel of the IJssel near the village of Veessen in Gelderland.

The harbour opened in its current form in January 2018 after a thorough renovation, and is managed by the volunteer-run Stichting Havenbeheer Veessen (SHV). It offers around 25 permanent berths and 15 visitor berths, with a depth of NAP -1.

20 m, alongside pontoons and box moorings. The site also serves as an access point for campers and includes a trailer ramp, making it a practical launch and landing spot on this quiet stretch of the IJssel.

A five-metre-tall Bashkir/Cossack statue watches over the harbour, and a traditional Dutch windmill adds to the setting. The location is well regarded as a base for cycling and walking routes in the surrounding river landscape.