Canton of Châteaugiron

Châteaugiron (French: [ʃɑtoʒiʁɔ̃]; Breton: Kastell-Geron; Gallo: Chaujon) is a commune in the Ille-et-Vilaine department of Brittany in northwestern France. It extended on 1 January 2017 by merging with the former communes of Saint-Aubin-du-Pavail and Ossé.

Domloup (French pronunciation: [dɔ̃lu]; Gallo: Donlô) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

Saint-Aubin-du-Pavail (French pronunciation: [sɛ̃.t‿obɛ̃ dy pavaj]; Breton: Sant-Albin-ar-Pavez) is a former commune in the Ille-et-Vilaine department in Brittany in northwestern France. On 1 January 2017, it was merged into the commune Châteaugiron.The name Saint-Aubin-du-Pavail comes from Saint Aubin, bishop of Angers in the 6th century. The term "Pavail" indicates the paving stone of the Gallo-Roman way which crossed the commune.

Brécé (French pronunciation: [bʁese]; Breton: Brec'heg; Gallo: Berczaé) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

Ossé (French pronunciation: [ɔse]; Breton: Oc'heg) is a former commune in the Ille-et-Vilaine department in Brittany in northwestern France. On 1 January 2017, it was merged into the commune Châteaugiron.

Nouvoitou (French pronunciation: [nuvwatu]; Breton: Neveztell) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

Noyal-sur-Vilaine (French pronunciation: [nwajal syʁ vilɛn]; Gallo: Noyal or Nouyal, Breton: Noal-ar-Gwilen) is a commune in the Ille-et-Vilaine department of Brittany in northwestern France.

Amanlis (French pronunciation: [amɑ̃lis]; Breton: Amanliz; Gallo: Amanli) is a commune in the department of Ille-et-Vilaine in the region of Brittany in western France. The inhabitants of Amanlis are known as Amanlisiens. The known history of Amanlis dates back to pre-Roman times, when the Riedones or Redones tribe of Gauls inhabited the area. The primary products of Amanlis are agricultural. From the 16th to the mid-19th centuries, it was a center of production of sailcloth made from locally grown hemp. Sites of interest include the parish church Saint-Martin-de-Tours and the Sainte-Anne-des-Bois chapel, which is dedicated to the patron saint of Brittany.

Servon-sur-Vilaine (French pronunciation: [sɛʁvɔ̃ syʁ vilɛn]; Breton: Servon, Gallo: Servon) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

Acigné (French pronunciation: [asiɲe]; Breton: Egineg; Gallo: Aczeinyae) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

Piré-sur-Seiche (French pronunciation: [piʁe syʁ sɛʃ]; Breton: Pereg) is a former commune in the Ille-et-Vilaine department of Brittany in northwestern France. On 1 January 2019, it was merged into the new commune Piré-Chancé.

Piré-Chancé (French pronunciation: [piʁe ʃɑ̃se]; Breton: Pereg-Kantieg) is a commune in the Ille-et-Vilaine department of Brittany in northwestern France. It was established on 1 January 2019 by merger of the former communes of Piré-sur-Seiche (the seat) and Chancé.