Breteil (French pronunciation: [bʁətɛj]; Gallo: Beurteuil, Breton: Brezhiel) is a commune in the department of Ille-et-Vilaine in Brittany.

In 1120, Raoul de Montfort included the castle of Breteil in the dowry of his daughter for her wedding to the earl of La Riolaye.

In 1152, the Lord of Montfort-sur-Meu gave two plots of agricultural land in Breteil to the abbey of Saint-Jacques de Montfort to contribute to the monks' activities.

Seventy-one voters voted for Mathurin Vitré de la Corbinais and Noël Legros to attend the next meeting of the Estates of the realm of the jurisdiction of the Sénéchal of Rennes.

The national guard only needed to fire a few times to make the insurgents panic; a dozen Breteillais were arrested, but most were released the next day.

At La Herdrouais, Jean Éveillard, captain of the national guard, is assassinated on 31 December while resisting people wearing masks and looking for guns.