Gargenville

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

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.

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.

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

Épône (French: [epon] ) is a commune in the Yvelines department in the Île-de-France region in north-central France. It is situated on the left bank of the River Seine 40 kilometres (25 mi) west of Paris. Together with Mézières-sur-Seine and La Falaise, it forms a settlement of around 10,000 inhabitants. Its inhabitants are known as Épônois. The name comes from the Latin Spedona and, according to Daniel Bricon, has no link to Epona the Gaulish goddess of horses and protector of horseriders.

Guitrancourt (French pronunciation: [ɡitʁɑ̃kuʁ]) is a commune in the Yvelines department in the Île-de-France region in north-central France. Philosopher Jacques Lacan owned a local mansion called Prévôté. He lived there from 1955 until his death in 1981 and was buried at the municipal cemetery.

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

Brueil-en-Vexin (French pronunciation: [bʁyɛj ɑ̃ vɛksɛ̃], literally Brueil in Vexin) is a commune in the Yvelines department in the Île-de-France region in north-central France.

Sailly (French pronunciation: [saji]) is a 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.

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