The Oostbuitenhaven is a harbor basin located in Terneuzen, in the province of Zeeland, Netherlands, situated alongside the Westbuitenhaven.

As part of the broader port infrastructure at Terneuzen, it is subject to periodic maintenance dredging to keep the waterway navigable.

This work is carried out in coordination with dredging operations at other nearby facilities, including the ferry terminal and marina at Terneuzen, as well as ports at Breskens, Hansweert, and Vlissingen.