De Koppoel Binnenhaven is the inner harbour of Jachthaven De Koppoel, a marina located on the Ripselaan in Rijpwetering, Zuid-Holland, directly alongside the Kagerplassen.

The binnenhaven sits across from the marina's main warehouse building and is particularly valued for its sheltered position, which makes it a preferred location for winter boat storage. A dedicated parking area is provided for binnenhaven guests.

The marina as a whole has operated since 1938 and offers more than 150 berths spread across both the binnenhaven and the buitenhaven. Shower and toilet facilities are available to berth holders in both harbours.

From this location, waterways including the Braassemermeer, Kagerplassen, Ringvaart Haarlemermeerpolder, and Westeinderplassen can be reached within about an hour by boat.