Marina 't Balkengat is a yacht harbour on the river Lek, situated on the right bank between kilometre markers 988 and 989, near the confluence of the Lek, Noord, and Nieuwe Maas in Krimpen aan de Lek.

It is the first marina upstream from the Kinderdijk–Krimpen aan de Lek car ferry crossing.

The harbour entrance appears narrow but is straightforward to navigate; when tidal current is running, skippers should enter heading into the current to prevent the stern from swinging.

The marina offers 59 berths for boats from 7 to 15 metres, with 220-volt shore power, drinking water, Wi-Fi, toilets, and showers on the floating jetties. A harbour depth of NAP minus 2 metres is maintained. The facility is open from April through October.

Nearby attractions include the world-famous windmills of Kinderdijk, the Biesbosch, and the city of Rotterdam.