|Elevation||0–127 m (0–417 ft)|
|Land area1||34.52 km2 (13.33 sq mi)|
|- Density||106 /km2 (270 /sq mi)|
|INSEE/Postal code||22194/ 22310|
|1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.|
|2 Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.|
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.
Inhabitants of Plestin-les-Grèves are called in French plestinais.
Breton language 
The municipality launched a linguistic plan through Ya d'ar brezhoneg on March 8, 2006.
In 2008, 29.64% of primary school children attended bilingual schools.
See also 
- (French) Ofis ar Brezhoneg: Enseignement bilingue
- Official website (French)
- French Ministry of Culture list for Plestin-les-Grèves (French)
- Example of property available in & around Plestin
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