Zaventem is a municipality located in the province of Flemish Brabant within the Flanders region of Belgium. It serves as a suburb of Brussels, with the subdivision of Sint-Stevens-Woluwe directly bordering the neighboring municipality of Woluwe-Saint-Lambert.
The municipality is situated in the Dijleland area, which is one of three large recreational zones that constitute the Groene Gordel surrounding the Brussels-Capital Region. The administrative territory of Zaventem includes the subdivisions of Nossegem, Sint-Stevens-Woluwe, Sterrebeek, and Zaventem proper.