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.

### 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

1. Cessy <small>(01071)</small>
1. Challex <small>(01078)</small>
1. Chevry <small>(01103)</small>
1. Chézery-Forens <small>(01104)</small>
1. Collonges <small>(01109)</small>
1. Crozet <small>(01135)</small>
1. Divonne-les-Bains <small>(01143)</small>
1. Échenevex <small>(01153)</small>
1. Farges <small>(01158)</small>
1. Ferney-Voltaire <small>(01160)</small>
1. Gex <small>(01173)</small>
1. Grilly <small>(01180)</small>
1. Léaz <small>(01209)</small>
1. Lélex <small>(01210)</small>
1. Mijoux <small>(01247)</small>
1. Ornex <small>(01281)</small>
1. Péron <small>(01288)</small>
1. Pougny <small>(01308)</small>
1. Prévessin-Moëns <small>(01313)</small>
1. Saint-Genis-Pouilly <small>(01354)</small>
1. Saint-Jean-de-Gonville <small>(01360)</small>
1. Sauverny <small>(01397)</small>
1. Ségny <small>(01399)</small>
1. Sergy <small>(01401)</small>
1. Thoiry <small>(01419)</small>
1. Versonnex <small>(01435)</small>
1. Vesancy <small>(01436)</small>

The _communes_ with more inhabitants in the _arrondissement_ are:

|INSEE code !! _Commune_ !! Population <small>(2014)</small> !! Canton || Intercommunality|||||
| --- | --- | --- | --- | --- |
|01173|Gex|11,141|Gex|Pays de Gex|
|01354|Saint-Genis-Pouilly|9,854|Saint-Genis-Pouilly|Pays de Gex|
|01160|Ferney-Voltaire|9,337|Saint-Genis-Pouilly|Pays de Gex|
|01143|Divonne-les-Bains|9,100|Gex|Pays de Gex|
|01313|Prévessin-Moëns|7,710|Saint-Genis-Pouilly|Pays de Gex|
|01419|Thoiry|6,061|Thoiry|Pays de Gex|
|01071|Cessy|4,797|Gex|Pays de Gex|
|01281|Ornex|4,303|Saint-Genis-Pouilly|Pays de Gex|
|01288|Péron|2,489|Thoiry|Pays de Gex|
|01435|Versonnex|2,170|Gex|Pays de Gex|

## Related pages

- Arrondissements of the Ain department
- List of arrondissements of France

## Infobox (french subdivision)

- **type**: arr
- **name**: Gex
- **insee**: 013
- **nbcomm**: 27
- **prefecture**: n
- **seat**: Gex, Ain, Gex
- **area**: 404.9
- **image map**: Locator map of Arrondissement Gex 2019.png
- **map caption**: Location within the region Auvergne-Rhône-Alpes