Val-d'Oise is a French department, created in 1968 after the split of the Seine-et-Oise department and located in the Île-de-France region. It gets its name from the Oise River, a major tributary of the Seine, which crosses the region after having started in Belgium and flowed through north-eastern France. Charles de Gaulle Airport, France's main international airport is partially located in Roissy-en-France, a commune of Val d'Oise.
The arrondissement of Pontoise is an arrondissement of France in the Val-d'Oise department in the Île-de-France region. It has 105 communes. Its population is 338,425 (2016), and its area is 766.0 km2 (295.8 sq mi).
Magny-en-Vexin is a commune in the Val-d'Oise département in Île-de-France in northern France. It is located in the regional nature park of Vexin.
Montagny-en-Vexin is a commune in the Oise department in northern France.
Chars is a commune in the Val-d'Oise department in Île-de-France in northern France. It is located in the regional nature park of Vexin.
Boissy-le-Bois is a former commune in the Oise department in northern France. On 1 January 2019, it was merged into the new commune La Corne-en-Vexin.
Boury-en-Vexin is a commune in the Oise department in northern France.
Énencourt-le-Sec is a former commune in the Oise department in northern France. On 1 January 2019, it was merged into the new commune La Corne-en-Vexin.
Chaumont-en-Vexin is a commune in the Oise department in northern France.
Ableiges is a commune in the Val-d'Oise department in Île-de-France in northern France. It is located in the regional nature park of Vexin.
Le Bellay-en-Vexin is a commune in the Val-d'Oise department in Île-de-France in northern France.
Boissy-l'Aillerie is a commune in the Val-d'Oise department in Île-de-France in northern France.
La Chapelle-en-Vexin is a commune in the Val-d'Oise department in Île-de-France in northern France.
Cléry-en-Vexin is a commune in the Val-d'Oise department in Île-de-France in northern France.
Cormeilles-en-Vexin is a commune in the Val-d'Oise department in Île-de-France in northern France.
Guiry-en-Vexin is a commune in the Val-d'Oise department in Île-de-France in northern France.
Hérouville-en-Vexin is a commune in the Val-d'Oise department in Île-de-France in northern France.
Maudétour-en-Vexin is a commune in the Val-d'Oise department in Île-de-France in northern France. It is located in the regional nature park of Vexin.
Neuilly-en-Vexin is a commune in the Val-d'Oise department in Île-de-France, northern France.
La Corne-en-Vexin is a commune in the Oise department in northern France. It was established on 1 January 2019 by merger of the former communes of Énencourt-le-Sec, Boissy-le-Bois and Hardivillers-en-Vexin.
