Iffendic (French pronunciation: [ifɛ̃dik]; Breton: Ilfentig; Gallo: Fendic) is a commune in the department of Ille-et-Vilaine in Brittany.

We can also mention other older traces from the Gallo-Roman period with the menhir of Pierre Longue (Neolithic) near the villages of La Barre and Vau-Savelin.

Normans devastated the district during the 10th century and the church changed of place, it was not at the edge of the Meu river anymore.

The parish was divided into 11 sections, in particular to collect taxes: the town centre, Allansac, la Barre, Boutavent, Canlou, Couacurel, Pintillac, Tréez, Tréhieuc, Trévit, and Vaubeuzet.

The major revolutionary event is the one celebrating the execution of Louis XVI, accompanied by a hatred oath to the royalty and to the anarchy.