The Heer van Diezenvaart is a canal located in the Dutch province of Overijssel, running just over 2 kilometers in length. It forms a link in the network of waterway connections extending from Blokzijl through De Weerribben toward the Frisian waterways. The canal begins at the Roomsloot near the village of Nederland (Overijssel) and ends at the point where the Heuvengracht and the Kalenbergergracht converge. Its watershed falls within the IJsselmeer drainage basin.

As part of the broader De Weerribben waterway system, the Heer van Diezenvaart serves as a connecting channel for those navigating between the southwestern and northern sections of this wetland region. Paddlers using this canal are typically passing through as part of a longer route rather than treating it as a destination in itself, given its modest length of just over 2 kilometers.