Arrondissement of Gex

The arrondissement of Gex is an arrondissement of France in the Ain department in the Auvergne-Rhône-Alpes region. Its capital is the city of Gex. It corresponds approximately to the historical region of the Pays de Gex.
History.
When the Ain department was created on 1800, the "arrondissement" of Gex was not part of that original department; the "arrondissement" was created in 1815. In 1926, the "arrondissement" was eliminated but in 1933 it became again an "arrondissement" of the Ain department.
Geography.
It is found in the northeastern part of the department with an area of , the smallest "arrondissement" of the department. It has 89,200 inhabitants and a density of inhabitants/km².
The "arrondissement" of Gex is bordered to the north and northwest by the Jura department, to the northeast and east by Switzerland, to the southeast by the Haute-Savoie department and to the southwest by the "arrondissement" of Nantua.
Composition.
Cantons.
After the reorganisation of the cantons in France, cantons are not subdivisions of the "arrondissements" so they could have "communes" that belong to different "arrondissements".
In the "arrondissement" of Gex, there are 3 cantons whose "communes" are in the "arrondissement": Gex (7 "communes"), Saint-Genis-Pouilly (4 "communes") and Thoiry (16 "communes"). The canton of Bellegarde-sur-Valserine has 1 "commune" in the "arrondissement" of Belley, 2 in Gex and 11 in the "arrondissement" of Nantua.
Communes.
The "arrondissement" of Gex has 27 "communes"; they are (with their INSEE codes)ː
The "communes" with more inhabitants in the "arrondissement" are: