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

The commune takes its name from Saint Collen, a 7th-century monk who is associated with the town of Llangollen in Wales and also with Cornwall.

Inhabitants of Langolen are called in French Langolinois.

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