Montigny-le-Bretonneux (French pronunciation: [mɔ̃tiɲi lə bʁətɔnø] ⓘ) is a commune in the Yvelines department in the Île-de-France region in north-central France.

It is situated at the heart of Yvelines, between the Vallée de Chevreuse and the Forest of Rambouillet in the south, and the towns of Versailles and Saint-Germain-en-Laye in the north.

In 2002, the State has decreed the end of the Operation of National Interest Statute establishing the new district of Saint-Quentin-en-Yvelines, whose seven member municipalities have opted for a new intercommunal principal, the “Community of Agglomeration”.

The parks were born in the 1970s and 1980s with the rise of the new town are and were in principle built to rehabilitate the economic heritage and to adapt to technological standards now imposed on businesses.

Recent developments in Montigny-le-Bretonneux include the national velodrome built between 2011 and 2014, supported by the State, the French Cycling Federation, local authorities and a pool of business partners, and the Faculty of Medicine (UFR des sciences de la santé Simone Veil), part of the Versailles Saint-Quentin-en-Yvelines University.