Épône

Mézières-sur-Seine (French pronunciation: [mezjɛʁ syʁ sɛn] , literally Mézières on Seine) is a commune in the Yvelines department in the Île-de-France region in north-central France. It is located in the western suburbs of Paris, near the bank of the Seine 47 km (29 mi) west of Paris. The name of the commune comes from the Latin word: maceria, meaning walls.

The Mauldre (French pronunciation: [moldʁ]) is a 35 km long river in France. It is a left tributary of the Seine. Its basin area is about 410 square kilometres, which covers 66 municipalities corresponding to 400 000 inhabitants. Its source elevation is 135 m. The Mauldre flows into the Seine near Épône. One of its affluents is the ru de Gally, whose source is in the gardens of Versailles.

La Falaise (French pronunciation: [la falɛz]) is a commune in the Yvelines department in the Île-de-France region in north-central France.

Nézel (French pronunciation: [nezɛl]) is the commune in the Yvelines department in the Île-de-France region in north-central France.

The canton of Aubergenville (French: Canton d'Aubergenville) is an administrative division of the Yvelines department, northern France. Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Aubergenville.It consists of the following communes:

The Communauté urbaine Grand Paris Seine et Oise is the communauté urbaine, an intercommunal structure, covering the western suburbs of Paris. It is located in the Yvelines department, in the Île-de-France region, northern France. It was created in January 2016 by the merger of the previous communautés d'agglomération Mantes-en-Yvelines, Deux Rives de la Seine, Poissy-Achères-Conflans-Sainte-Honorine, Seine & Vexin and the communautés de communes Coteaux du Vexin and Seine-Mauldre. Its area is 504.7 km2. Its population was 417,556 in 2018. Its seat is in Aubergenville.

Gargenville (French pronunciation: [ɡaʁʒɑ̃vil]) is a commune in the Yvelines department in the Île-de-France region in north-central France, 45 km to the center of Paris. It is part of the Parc naturel régional du Vexin français. With the neighborhing commune of Issou, it forms an urban area of around 10000 inhabitants. Inhabitants are known in French as the Gargenvillois.

Aulnay-sur-Mauldre (French pronunciation: [o(l)nɛ syʁ moldʁ]) is a commune in the Yvelines department in north-central France.

Aubergenville (French pronunciation: [obɛʁʒɑ̃vil]) is a commune in the Yvelines department in north-central France. It is located between Mantes-la-Jolie and Saint-Germain-en-Laye, in the valley of the Seine. This city is located near the Côteau de Montgardé on the road to Normandy.

Porcheville (French: [pɔʁʃəvil] ) is a commune in the Yvelines department in the Île-de-France region in north-central France.

Issou (French pronunciation: [isu]) is a commune in the Yvelines department, administrative region of Île-de-France, France.

Juziers (French pronunciation: [ʒyzje]) is a commune in the Yvelines department in the Île-de-France region in north-central France.