The Pays de France, also called the Parisis or Plaine de France, is a natural region located in the Île-de-France administrative region to the north of Paris, France. It is essentially a silt plain devoted to cereal crops, of which the southern part is included in the northern suburbs of Paris and greatly urbanised, and also includes Charles de Gaulle Airport.

Val-d'Oise is a department in the Île-de-France region, Northern France. It was created in 1968 following the split of the Seine-et-Oise department. In 2019, Val-d'Oise had a population of 1,249,674.