Plestin-les-Grèves is a commune in the Côtes-d'Armor department of Brittany in north-western France.
Plestin-les-Grèves is situated on the north coast of Brittany, with a sailing club in Stefflam and Loquirec. There are a few riding schools.
Plestin-les-Grèves is twinned with Launceston in Cornwall, United Kingdom