Arrondissement of Gex
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.