Ittre (Dutch : Itter) is a Walloon municipality located in the Belgian province of Walloon Brabant. On January 1, 2006 Ittre had a total population of 6,064. The total area is 34.92 km² which gives a population density of 174 inhabitants per km². Ittre was the geographical center of Belgium until World War I.
Traditions mention the existence of the village of Ittre about the year 640, although the name is first documented in 877. But the site was already occupied in the Roman period and even in the Neolithic era.
Its territory, after having belonged to Nivelles Abbey, was divided into several seigniories, Ittre and Fauquez being the most significant, the lords of which were in constant conflict over their jurisdiction, sovereignty and precedence in the territory and in the church of Ittre. These disputes ended only at the beginning of the 18th century. Among the most significant families in the seigniory of Ittre were those of Ittre, Rifflart and Trazegnies d' Ittre, and in Fauquez, the families of Ittre, Enghien, Fauquez and Herzelles. Fauquez and Ittre both furnished titles to marquisates, in 1689 and 1703 respectively.
The commune was connected with a number of notable persons, including Ambroise-Joseph de Herzelles, third marquis de Fauquez, whom the Empress Maria-Theresa appointed Superintendent and General Manager of the Finances and Domains of the Netherlands.