Plougastel-Daoulas (French pronunciation: [pluɡastɛl daulas]; Breton: Plougastell-Daoulaz) is a commune in the Finistère department, located in the administrative region of Brittany, northwestern France.

The municipality launched a linguistic plan concerning the Breton language through Ya d'ar brezhoneg on 28 October 2005.

The New World species of strawberry, Fragaria chiloensis, which had been introduced into France by Amédée-François Frézier (1682–1773), flourished in the marine climate of Plougastel.

There had been failed attempts to cultivate fragaria chiloensis in Anjou, Touraine, and the lower-Loire areas.

[6] This chapel has an interesting 17th-century sculpture in wood entitled "Saint Martin et le Pauvre".

There is a statue in polychromed wood of Saint Guénolé in the chapel to the left side of the altarpiece.

Not far from nearby Anse du Caro, a message is carved on a rock, beginning with "grocar drear diozeevbio", followed on by other writings in an unknown language.

The text includes enigmatic drawings, such as a heart linked to a cross, and a sailboat close to the sea.