Itterbeek is a historical village in the province of Flemish Brabant, Belgium, and since 1977 a submunicipality of Dilbeek.
The village derives its name from the Indo-European words 'eud-' (water) en 'baki' (stream).
Itterbeek gained some importance in the 13th century when the area, despite the presence of vassals of the family van der Aa, came under the power of Gaasbeek and formed the so-called Nieuw Land van Gaasbeek together with Dilbeek and Sint-Martens-Bodegem.
In 1690 Itterbeek, Dilbeek and Sint-Martens-Bodegem were made a countship, Tirimont, by Charles II of Spain, and awarded to Louis-Alexander Scockart.
The village of Sint-Anna-Pede (and a small part of Sint-Gertrudis-Pede) also lie within the borders of the submunicipality of Itterbeek.