Plogoff (French pronunciation: [plɔɡɔf]; Breton: Plougoñ) is a commune in the Finistère department of Brittany in north-western France.

As for other cities like Guiscriff, Plélauff or the surnames Le Hénaff, Heussaff or Gourcuff, the digraph -ff was introduced by Middle Ages' authors to indicate a nasalized vowel.

In 1980, the national government and EDF attempted to fulfil their statutory obligations to display the required inquiry documents in the local mairie or city hall.

In response, the national government set up mobile mairies annexes to display the documents in town centres.

A documentary Plogoff, des pierres contre des fusils (Plogoff, stones against rifles) relating the struggle against the French security forces was later produced by Nicole and Félix Le Garrec.